Query: When was my last Respiratory rate measurement and what was the result?, FHIR Resource: {'resourceType': 'Observation', 'status': 'final', 'category': [{'coding': [{'system': 'http://terminology.hl7.org/CodeSystem/observation-category', 'code': 'social-history', 'display': 'Social history'}]}], 'code': {'coding': [{'system': 'http://loinc.org', 'code': '72166-2', 'display': 'Tobacco smoking status'}], 'text': 'Tobacco smoking status'}, 'subject': {'reference': 'urn:uuid:e32bf962-7e7b-67c7-04fd-c1627f7eb397'}, 'effectiveDateTime': '2021-12-19T11:53:27+05:30', 'valueQuantity': None, 'interpretation': None}