Query: When was my last immunization?, FHIR Resource: {'resourceType': 'Immunization', 'status': 'completed', 'vaccineCode': {'coding': [{'system': 'http://hl7.org/fhir/sid/cvx', 'code': '133', 'display': 'Pneumococcal conjugate PCV 13'}], 'text': 'Pneumococcal conjugate PCV 13'}, 'patient': {'reference': 'urn:uuid:ca7c93ba-086d-251a-d6f7-bc385a19b352'}, 'occurrenceDateTime': '2015-04-06T09:55:52+05:30', 'primarySource': True}