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': 1963}
Prior Diagnosis 1: {'condition': 'Prediabetes', 'condition status': 'Not Extracted', 'start date': '1990-06-17', 'end date': None}
Prior Diagnosis 2: {'condition': 'Viral sinusitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2013-03-02', 'end date': '2013-03-24'}
Prior Diagnosis 3: {'condition': 'Viral sinusitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2013-04-24', 'end date': '2013-05-26'}
Prior Diagnosis 4: {'condition': 'Acute bronchitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2014-01-25', 'end date': '2014-02-14'}
Prior Diagnosis 5: {'condition': 'Acute viral pharyngitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2017-02-14', 'end date': '2017-02-24'}
Last Carbon Dioxide measurement on 2016-05-24 00:00:00: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmol/L', 'value': 21.0}
Prior measurements of the same type 1: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmol/L', 'value': 26.0}
Prior measurements of the same type 2: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmol/L', 'value': 25.0}
Prior measurements of the same type 3: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmol/L', 'value': 27.0}
Prior measurements of the same type 4: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmol/L', 'value': 21.0}
Prior measurements of different types 1: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 2: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'cm', 'value': 175.05}
Prior measurements of different types 3: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'kg', 'value': 105.52}
Prior measurements of different types 4: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'kg/m2', 'value': 34.43}
Prior measurements of different types 5: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmHg', 'value': 137.0}
Prior measurements of different types 6: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmHg', 'value': 80.0}
Prior measurements of different types 7: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 8: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 93.0}
Prior measurements of different types 9: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 10.0}
Prior measurements of different types 10: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 11: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 9.19}
Prior measurements of different types 12: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmol/L', 'value': 142.0}
Prior measurements of different types 13: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmol/L', 'value': 5.16}
Prior measurements of different types 14: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mmol/L', 'value': 111.0}
Prior measurements of different types 15: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 168.0}
Prior measurements of different types 16: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 136.0}
Prior measurements of different types 17: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 69.0}
Prior measurements of different types 18: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-17T00:00:00', 'unit': 'mg/dL', 'value': 71.0}
Prior measurements of different types 19: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': '%', 'value': 6.3}
Prior measurements of different types 20: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'cm', 'value': 175.05}
Prior measurements of different types 21: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'kg', 'value': 110.58}
Prior measurements of different types 22: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'kg/m2', 'value': 36.08}
Prior measurements of different types 23: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmHg', 'value': 134.0}
Prior measurements of different types 24: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmHg', 'value': 71.0}
Prior measurements of different types 25: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': '%', 'value': 6.3}
Prior measurements of different types 26: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mg/dL', 'value': 88.0}
Prior measurements of different types 27: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mg/dL', 'value': 19.0}
Prior measurements of different types 28: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 29: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mg/dL', 'value': 10.17}
Prior measurements of different types 30: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmol/L', 'value': 137.0}
Prior measurements of different types 31: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmol/L', 'value': 4.64}
Prior measurements of different types 32: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2013-01-28T00:00:00', 'unit': 'mmol/L', 'value': 111.0}
Prior measurements of different types 33: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 34: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'cm', 'value': 175.05}
Prior measurements of different types 35: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'kg', 'value': 110.58}
Prior measurements of different types 36: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'kg/m2', 'value': 36.08}
Prior measurements of different types 37: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmHg', 'value': 129.0}
Prior measurements of different types 38: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmHg', 'value': 82.0}
Prior measurements of different types 39: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 40: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 83.0}
Prior measurements of different types 41: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 8.0}
Prior measurements of different types 42: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 43: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 8.99}
Prior measurements of different types 44: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 45: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmol/L', 'value': 4.45}
Prior measurements of different types 46: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mmol/L', 'value': 108.0}
Prior measurements of different types 47: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 196.0}
Prior measurements of different types 48: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 129.0}
Prior measurements of different types 49: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 97.0}
Prior measurements of different types 50: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-05-24T00:00:00', 'unit': 'mg/dL', 'value': 73.0}
Prior measurements of different types 51: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 52: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'cm', 'value': 175.05}
Prior measurements of different types 53: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'kg', 'value': 110.58}
Prior measurements of different types 54: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'kg/m2', 'value': 36.08}
Prior measurements of different types 55: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmHg', 'value': 128.0}
Prior measurements of different types 56: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmHg', 'value': 76.0}
Prior measurements of different types 57: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': '%', 'value': 6.4}
Prior measurements of different types 58: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mg/dL', 'value': 70.0}
Prior measurements of different types 59: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mg/dL', 'value': 13.0}
Prior measurements of different types 60: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 61: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mg/dL', 'value': 9.69}
Prior measurements of different types 62: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 63: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmol/L', 'value': 4.57}
Prior measurements of different types 64: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2016-05-24T00:00:00', 'unit': 'mmol/L', 'value': 101.0}
Prior measurements of different types 65: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2017-02-16T00:00:00', 'unit': 'Cel', 'value': 37.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2010-10-17', 'end datetime': '2010-10-17'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-01-28', 'end datetime': '2013-01-28'}
Visit 3: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-03-11', 'end datetime': '2013-03-11'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-05-01', 'end datetime': '2013-05-01'}
Visit 5: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-12-07', 'end datetime': '2013-12-07'}
Visit 6: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-01-27', 'end datetime': '2014-01-27'}
Visit 7: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2015-05-24', 'end datetime': '2015-05-24'}
Visit 8: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2016-05-24', 'end datetime': '2016-05-24'}
Visit 9: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2017-02-16', 'end datetime': '2017-02-16'}
Medication 1: {'Drug name': 'Dextromethorphan Hydrobromide 1 MG/ML', 'Start datetime': '2014-01-27', 'End datetime': '2014-02-14', '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': '2013-12-07', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Measurement of respiratory function (procedure)', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2014-01-27', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Carbon Dioxide value be on 2017-05-20 00:00:00?
A. 29.0
B. 27.0
C. 21.0
D. 21.0
E. 20.0
Please share a single capital letter representing your selected answer: 
29.0 27.0 21.0 21.0 20.0