{"database": "openregs", "table": "fr_regs_crossref", "rows": [["2021-12431", "EPA-R09-OAR-2020-0589-0008"]], "columns": ["fr_document_number", "regs_document_id"], "primary_keys": ["fr_document_number", "regs_document_id"], "primary_key_values": ["2021-12431", "EPA-R09-OAR-2020-0589-0008"], "units": {}, "query_ms": 0.35355391446501017, "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"}