A company discovers that a third-party document used in its AI corpus has unclear usage rights. What is the appropriate governance response?

1. Ask the model to declare the document legally unrestricted.
2. Remove only the author name and continue using the content unchanged.
3. Assume every publicly downloadable document has unrestricted training and redistribution rights.
4. Review provenance and permitted use, suspend unsupported use where necessary, and obtain the required approval.