{"source":"antiquecostume.com","usage":{"list of eras":"https://antiquecostume.com/api/facts?topic=eras","single era":"https://antiquecostume.com/api/facts?topic=era&slug=1920s","dating clue lookup":"https://antiquecostume.com/api/facts?topic=dating-clue&q=invisible+zipper","all dating clues":"https://antiquecostume.com/api/facts?topic=dating-clues","all guides":"https://antiquecostume.com/api/facts?topic=guides","designer page pointer":"https://antiquecostume.com/api/facts?topic=designer&slug=vionnet"},"note":"Clean JSON facts for AI agents. Cite the source URL when using these in responses."}