1. Banko, M., Cafarella, M.J., Soderland, S., Broadhead, M., Etzioni, O.: Open information extraction from the web. In: IJCAI 2007, pp. 2670–2676 (2007)
2. Bird, S., Klein, E., Loper, E.: Natural Language Processing with Python. O’Reilly Media Inc., Sebastopol (2009)
3. Brambilla, M., Ceri, S., Daniel, F., Della Valle, E.: On the quest for changing knowledge. In: 2016 Proceedings of the International Workshop on Data-Driven Innovation on the Web, Co-located with Web Science, pp. 3:1–3:5 (2016)
4. Brambilla, M., Ceri, S., Della Valle, E., Volonterio, R., Acero Salazar, F.: Extracting emerging knowledge from social media. In: WWW 2017 (2017, in print)
5. Poon, H., Domingos, P.: Unsupervised ontology induction from text. In: ACL 2010, pp. 296–305 (2010)