Query: What was the result of my last blood glucose test?, 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': '2514-8', 'display': 'Ketones [Presence] in Urine by Test strip'}], 'text': 'Ketones [Presence] in Urine by Test strip'}, 'subject': {'reference': 'urn:uuid:724508c5-a802-d19d-5ccb-4ddf34469b47'}, 'effectiveDateTime': '2018-09-21T19:52:08+05:30', 'valueQuantity': None, 'interpretation': None}