Query: What was my heart rate during my last visit?, FHIR Resource: {'resourceType': 'Observation', 'status': 'final', 'category': [{'coding': [{'system': 'http://terminology.hl7.org/CodeSystem/observation-category', 'code': 'laboratory', 'display': 'Laboratory'}]}], 'code': {'coding': [{'system': 'http://loinc.org', 'code': '2085-9', 'display': 'Cholesterol in HDL [Mass/volume] in Serum or Plasma'}], 'text': 'Cholesterol in HDL [Mass/volume] in Serum or Plasma'}, 'subject': {'reference': 'urn:uuid:2e167b80-1b1b-a84b-feb7-2449200180e1'}, 'effectiveDateTime': '2017-03-09T01:34:15+05:30', 'valueQuantity': {'value': 26.69, 'unit': 'mg/dL', 'system': 'http://unitsofmeasure.org', 'code': 'mg/dL'}, 'interpretation': None}