Query: When did I last request my albuterol inhalation solution?, FHIR Resource: {'resourceType': 'Immunization', 'status': 'completed', 'vaccineCode': {'coding': [{'system': 'http://hl7.org/fhir/sid/cvx', 'code': '03', 'display': 'MMR'}], 'text': 'MMR'}, 'patient': {'reference': 'urn:uuid:e32bf962-7e7b-67c7-04fd-c1627f7eb397'}, 'occurrenceDateTime': '2017-11-19T11:53:27+05:30', 'primarySource': True}