CC0 1.0 Universal (CC0 1.0) Public Domain Dedication

The author of this dataset has dedicated it to the public domain by waiving all rights to the
work worldwide under copyright law, including all related and neighbouring rights, to the
extent allowed by law. You can copy, modify, distribute and perform the work, even for
commercial purposes, all without asking permission.

Full text: https://creativecommons.org/publicdomain/zero/1.0/legalcode