Query: When was my last prenatal visit?, FHIR Resource: {'resourceType': 'Procedure', 'status': 'completed', 'category': None, 'code': {'coding': [{'system': 'http://snomed.info/sct', 'code': '44608003', 'display': 'Blood group typing (procedure)'}], 'text': 'Blood group typing (procedure)'}, 'subject': {'reference': 'urn:uuid:d02baa31-9644-9ee3-cb2c-4f9fb487bd24'}, 'performedDateTime': None}