The library is LGPL3 but does not ship the full text of the license, I contacted upstream about this issue:
https://github.com/wackou/guessit/issues/69 -- Etienne Millon -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
