{"database": "openregs", "table": "fr_regs_crossref", "rows": [["2015-28106", "EPA-R04-OAR-2015-0456-0002"]], "columns": ["fr_document_number", "regs_document_id"], "primary_keys": ["fr_document_number", "regs_document_id"], "primary_key_values": ["2015-28106", "EPA-R04-OAR-2015-0456-0002"], "units": {}, "query_ms": 1.2954419944435358, "source": "Federal Register API & Regulations.gov API", "source_url": "https://www.federalregister.gov/developers/api/v1", "license": "Public Domain (U.S. Government data)", "license_url": "https://www.regulations.gov/faq"}