1. musicbrainz (2018). http://www.musicbrainz.org/MM/
2. nldata (2018). http://www.cs.utexas.edu/users/ml/nldata.html
3. pytorch (2018). http://pytorch.org/
4. PRECISE (2003–2004). https://github.com/everling/PRECISE
5. WordNet (1995). https://wordnet.princeton.edu/wordnet/download