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': 'FEMALE', 'year of birth': 1963}
Prior Diagnosis 1: {'condition': 'Prediabetes', 'condition status': 'Not Extracted', 'start date': '1997-02-24', 'end date': None}
Prior Diagnosis 2: {'condition': 'Escherichia coli urinary tract infection', 'condition status': 'Not Extracted', 'start date': '2015-08-15', 'end date': '2015-08-22'}
Last Urea Nitrogen measurement on 2016-02-07 00:00:00: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mg/dL', 'value': 18.0}
Prior measurements of the same type 1: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 9.0}
Prior measurements of the same type 2: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mg/dL', 'value': 19.0}
Prior measurements of the same type 3: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 8.0}
Prior measurements of the same type 4: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mg/dL', 'value': 18.0}
Prior measurements of different types 1: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 2: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'cm', 'value': 162.87}
Prior measurements of different types 3: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'kg', 'value': 112.18}
Prior measurements of different types 4: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'kg/m2', 'value': 42.29}
Prior measurements of different types 5: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmHg', 'value': 111.0}
Prior measurements of different types 6: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmHg', 'value': 82.0}
Prior measurements of different types 7: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 8: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 72.0}
Prior measurements of different types 9: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 10: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 9.64}
Prior measurements of different types 11: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmol/L', 'value': 140.0}
Prior measurements of different types 12: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmol/L', 'value': 4.25}
Prior measurements of different types 13: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmol/L', 'value': 106.0}
Prior measurements of different types 14: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mmol/L', 'value': 20.0}
Prior measurements of different types 15: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 195.0}
Prior measurements of different types 16: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 107.0}
Prior measurements of different types 17: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 95.0}
Prior measurements of different types 18: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-04-03T00:00:00', 'unit': 'mg/dL', 'value': 78.0}
Prior measurements of different types 19: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 20: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'cm', 'value': 162.87}
Prior measurements of different types 21: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'kg', 'value': 115.82}
Prior measurements of different types 22: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'kg/m2', 'value': 43.66}
Prior measurements of different types 23: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmHg', 'value': 130.0}
Prior measurements of different types 24: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmHg', 'value': 76.0}
Prior measurements of different types 25: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': '%', 'value': 6.0}
Prior measurements of different types 26: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mg/dL', 'value': 79.0}
Prior measurements of different types 27: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 28: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mg/dL', 'value': 8.86}
Prior measurements of different types 29: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmol/L', 'value': 136.0}
Prior measurements of different types 30: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmol/L', 'value': 5.05}
Prior measurements of different types 31: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmol/L', 'value': 101.0}
Prior measurements of different types 32: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-03T00:00:00', 'unit': 'mmol/L', 'value': 20.0}
Prior measurements of different types 33: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 34: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'cm', 'value': 162.87}
Prior measurements of different types 35: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'kg', 'value': 115.82}
Prior measurements of different types 36: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'kg/m2', 'value': 43.66}
Prior measurements of different types 37: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmHg', 'value': 104.0}
Prior measurements of different types 38: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmHg', 'value': 85.0}
Prior measurements of different types 39: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 40: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 93.0}
Prior measurements of different types 41: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 42: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 9.93}
Prior measurements of different types 43: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 44: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmol/L', 'value': 4.94}
Prior measurements of different types 45: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmol/L', 'value': 111.0}
Prior measurements of different types 46: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mmol/L', 'value': 25.0}
Prior measurements of different types 47: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 190.0}
Prior measurements of different types 48: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 111.0}
Prior measurements of different types 49: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 88.0}
Prior measurements of different types 50: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-03-14T00:00:00', 'unit': 'mg/dL', 'value': 79.0}
Prior measurements of different types 51: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 52: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'cm', 'value': 162.87}
Prior measurements of different types 53: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'kg', 'value': 115.82}
Prior measurements of different types 54: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'kg/m2', 'value': 43.66}
Prior measurements of different types 55: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mmHg', 'value': 120.0}
Prior measurements of different types 56: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', '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': '2016-02-07T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 58: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mg/dL', 'value': 91.0}
Prior measurements of different types 59: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 60: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mg/dL', 'value': 9.12}
Prior measurements of different types 61: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mmol/L', 'value': 142.0}
Prior measurements of different types 62: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mmol/L', 'value': 4.21}
Prior measurements of different types 63: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mmol/L', 'value': 103.0}
Prior measurements of different types 64: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2016-02-07T00:00:00', 'unit': 'mmol/L', 'value': 29.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-04-03', 'end datetime': '2011-04-03'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-05-03', 'end datetime': '2013-05-03'}
Visit 3: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-12-11', 'end datetime': '2013-12-11'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2015-03-14', 'end datetime': '2015-03-14'}
Visit 5: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2015-08-15', 'end datetime': '2015-08-15'}
Visit 6: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2016-02-07', 'end datetime': '2016-02-07'}
Medication 1: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1970-12-03', 'End datetime': '1970-12-03', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1977-08-12', 'End datetime': '1977-08-12', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 3: {'Drug name': 'Nitrofurantoin 5 MG/ML [Furadantin]', 'Start datetime': '2015-08-15', 'End datetime': '2015-08-22', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 4: {'Drug name': 'Phenazopyridine hydrochloride 100 MG [Pyridium]', 'Start datetime': '2015-08-15', 'End datetime': '2015-08-22', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Procedure 1: {'procedure': 'Colonoscopy', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2013-12-11', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2015-03-14', '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 2016-12-29 00:00:00?
A. 12.0
B. 14.0
C. 20.0
D. 17.0
E. 12.0
Please share a single capital letter representing your selected answer: 
12.0 14.0 20.0 17.0 12.0