You are an assistant tasked with analyzing measurement histories to predict the patient's next laboratory or vital sign value.
<PatientData>
Demographics: {'race': 'White', 'gender': 'MALE', 'year of birth': 1969}
Prior Diagnosis 1: {'condition': 'Laceration of foot', 'condition status': 'Not Extracted', 'start date': '1982-02-03', 'end date': '1982-02-25'}
Prior Diagnosis 2: {'condition': 'Prediabetes', 'condition status': 'Not Extracted', 'start date': '1988-06-20', 'end date': None}
Prior Diagnosis 3: {'condition': 'Whiplash injury to neck', 'condition status': 'Not Extracted', 'start date': '2013-08-06', 'end date': '2013-09-06'}
Prior Diagnosis 4: {'condition': 'Acute bronchitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2014-02-28', 'end date': '2014-03-09'}
Prior Diagnosis 5: {'condition': 'Acute viral pharyngitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2017-04-04', 'end date': '2017-04-20'}
Last Urea Nitrogen measurement on 2017-03-22 00:00:00: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mg/dL', 'value': 9.0}
Prior measurements of the same type 1: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 9.0}
Prior measurements of the same type 2: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mg/dL', 'value': 11.0}
Prior measurements of the same type 3: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 11.0}
Prior measurements of the same type 4: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mg/dL', 'value': 9.0}
Prior measurements of different types 1: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 2: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'cm', 'value': 167.76}
Prior measurements of different types 3: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'kg', 'value': 112.46}
Prior measurements of different types 4: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'kg/m2', 'value': 39.96}
Prior measurements of different types 5: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmHg', 'value': 101.0}
Prior measurements of different types 6: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmHg', 'value': 83.0}
Prior measurements of different types 7: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 8: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 97.0}
Prior measurements of different types 9: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 10: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 9.7}
Prior measurements of different types 11: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmol/L', 'value': 141.0}
Prior measurements of different types 12: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmol/L', 'value': 5.1}
Prior measurements of different types 13: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmol/L', 'value': 109.0}
Prior measurements of different types 14: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mmol/L', 'value': 27.0}
Prior measurements of different types 15: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 174.0}
Prior measurements of different types 16: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 117.0}
Prior measurements of different types 17: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 70.0}
Prior measurements of different types 18: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-05T00:00:00', 'unit': 'mg/dL', 'value': 80.0}
Prior measurements of different types 19: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': '%', 'value': 6.1}
Prior measurements of different types 20: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'cm', 'value': 167.76}
Prior measurements of different types 21: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'kg', 'value': 115.51}
Prior measurements of different types 22: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'kg/m2', 'value': 41.04}
Prior measurements of different types 23: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmHg', 'value': 110.0}
Prior measurements of different types 24: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmHg', 'value': 87.0}
Prior measurements of different types 25: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': '%', 'value': 6.1}
Prior measurements of different types 26: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mg/dL', 'value': 81.0}
Prior measurements of different types 27: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 28: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mg/dL', 'value': 9.17}
Prior measurements of different types 29: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 30: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmol/L', 'value': 4.0}
Prior measurements of different types 31: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmol/L', 'value': 105.0}
Prior measurements of different types 32: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-04T00:00:00', 'unit': 'mmol/L', 'value': 25.0}
Prior measurements of different types 33: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 34: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'cm', 'value': 167.76}
Prior measurements of different types 35: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'kg', 'value': 118.58}
Prior measurements of different types 36: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'kg/m2', 'value': 42.14}
Prior measurements of different types 37: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmHg', 'value': 121.0}
Prior measurements of different types 38: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmHg', 'value': 72.0}
Prior measurements of different types 39: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 40: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 69.0}
Prior measurements of different types 41: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 42: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 9.65}
Prior measurements of different types 43: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmol/L', 'value': 144.0}
Prior measurements of different types 44: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmol/L', 'value': 4.37}
Prior measurements of different types 45: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmol/L', 'value': 108.0}
Prior measurements of different types 46: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mmol/L', 'value': 25.0}
Prior measurements of different types 47: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 177.0}
Prior measurements of different types 48: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 135.0}
Prior measurements of different types 49: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 72.0}
Prior measurements of different types 50: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-12-09T00:00:00', 'unit': 'mg/dL', 'value': 78.0}
Prior measurements of different types 51: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': '%', 'value': 6.3}
Prior measurements of different types 52: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'cm', 'value': 167.76}
Prior measurements of different types 53: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'kg', 'value': 123.13}
Prior measurements of different types 54: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'kg/m2', 'value': 43.75}
Prior measurements of different types 55: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmHg', 'value': 118.0}
Prior measurements of different types 56: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmHg', 'value': 77.0}
Prior measurements of different types 57: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': '%', 'value': 6.3}
Prior measurements of different types 58: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mg/dL', 'value': 72.0}
Prior measurements of different types 59: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 60: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mg/dL', 'value': 8.81}
Prior measurements of different types 61: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmol/L', 'value': 136.0}
Prior measurements of different types 62: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmol/L', 'value': 5.0}
Prior measurements of different types 63: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmol/L', 'value': 107.0}
Prior measurements of different types 64: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2017-03-22T00:00:00', 'unit': 'mmol/L', 'value': 24.0}
Prior measurements of different types 65: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2017-04-07T00:00:00', 'unit': 'Cel', 'value': 37.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2010-10-05', 'end datetime': '2010-10-05'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-12-04', 'end datetime': '2012-12-04'}
Visit 3: {'visit': 'Emergency Room Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-08-06', 'end datetime': '2013-08-06'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-03-02', 'end datetime': '2014-03-02'}
Visit 5: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-12-09', 'end datetime': '2014-12-09'}
Visit 6: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2017-03-22', 'end datetime': '2017-03-22'}
Visit 7: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2017-04-07', 'end datetime': '2017-04-07'}
Medication 1: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1973-05-30', 'End datetime': '1973-05-30', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Acetaminophen 325 MG Oral Tablet', 'Start datetime': '2013-08-06', 'End datetime': '2013-09-06', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 3: {'Drug name': 'Dextromethorphan Hydrobromide 1 MG/ML', 'Start datetime': '2014-03-02', 'End datetime': '2014-03-09', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Procedure 1: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2012-12-04', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Measurement of respiratory function (procedure)', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2014-03-02', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 3: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2017-03-22', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Urea Nitrogen value be on 2017-04-22 00:00:00?
A. 9.0
B. 7.0
C. 16.0
D. 10.0
E. 20.0
Please share a single capital letter representing your selected answer: 
9.0 7.0 16.0 10.0 20.0