Query: What was my respiratory rate measurement on my last visit?, 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': '59576-9', 'display': 'Body mass index (BMI) [Percentile] Per age and sex'}], 'text': 'Body mass index (BMI) [Percentile] Per age and sex'}, 'subject': {'reference': 'urn:uuid:149095b2-8fb5-b9b2-9958-78b0532f8115'}, 'effectiveDateTime': '2016-09-09T20:26:42+05:30', 'valueQuantity': {'value': 89.511, 'unit': '%', 'system': 'http://unitsofmeasure.org', 'code': '%'}, 'interpretation': None}