Query: What was my pain severity score on my last visit?, FHIR Resource: {'resourceType': 'Immunization', 'status': 'completed', 'vaccineCode': {'coding': [{'system': 'http://hl7.org/fhir/sid/cvx', 'code': '140', 'display': 'Influenza, seasonal, injectable, preservative free'}], 'text': 'Influenza, seasonal, injectable, preservative free'}, 'patient': {'reference': 'urn:uuid:e32bf962-7e7b-67c7-04fd-c1627f7eb397'}, 'occurrenceDateTime': '2021-12-12T11:53:27+05:30', 'primarySource': True}