Query: What was the size of my last polyp?, 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': '8867-4', 'display': 'Heart rate'}], 'text': 'Heart rate'}, 'subject': {'reference': 'urn:uuid:a1d2d741-ad12-6902-27e8-b48dcdd1f361'}, 'effectiveDateTime': '2022-08-22T13:07:10+05:30', 'valueQuantity': {'value': 66, 'unit': '/min', 'system': 'http://unitsofmeasure.org', 'code': '/min'}, 'interpretation': None}