You can download Library of Congress authority files in various formats from https://id.loc.gov/download/ Since it's April Fool's Day, let me ask a foolish question: does anyone have code for extracting data from these files? Preferably the MADS/RDF/JSON format files. Preferably Python code. I'm interested in extracting (e.g.) the names from the name authority file, so I can check the various name fields in a MARC record (e.g., 100 $a) -- and do it locally, without calling an API for each entry. Graeme Williams Las Vegas, NV github.com/lagbolt