Query: When was the last time my blood calcium level checked?, FHIR Resource: {'resourceType': 'Procedure', 'status': 'completed', 'category': None, 'code': {'coding': [{'system': 'http://snomed.info/sct', 'code': '171207006', 'display': 'Depression screening (procedure)'}], 'text': 'Depression screening (procedure)'}, 'subject': {'reference': 'urn:uuid:f6e6ce1a-0bb3-064f-eafd-4dd97d7a23b2'}, 'performedDateTime': None}