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': '92131-2', 'display': 'Respiratory syncytial virus RNA [Presence] in Respiratory specimen by NAA with probe detection'}], 'text': 'Respiratory syncytial virus RNA [Presence] in Respiratory specimen by NAA with probe detection'}, 'subject': {'reference': 'urn:uuid:2e167b80-1b1b-a84b-feb7-2449200180e1'}, 'effectiveDateTime': '2021-02-05T01:45:15+05:30', 'valueQuantity': None, 'interpretation': None}