Query: What was the result of my Body Mass Index test conducted recently?, FHIR Resource: {'resourceType': 'Observation', 'status': 'final', 'category': [{'coding': [{'system': 'http://terminology.hl7.org/CodeSystem/observation-category', 'code': 'vital-signs', 'display': 'Vital signs'}]}], 'code': {'coding': [{'system': 'http://loinc.org', 'code': '9279-1', 'display': 'Respiratory rate'}], 'text': 'Respiratory rate'}, 'subject': {'reference': 'urn:uuid:754ca69d-37b2-161a-bd28-3f855615e204'}, 'effectiveDateTime': '2019-12-22T00:06:47+05:30', 'valueQuantity': {'value': 15, 'unit': '/min', 'system': 'http://unitsofmeasure.org', 'code': '/min'}, 'interpretation': None}