(everyone has to read this)
(mandatory if you choose this as your expertise topic)
Weld, Daniel S., Raphael Hoffmann, and Fei Wu. “Using wikipedia to bootstrap open information extraction.” Acm Sigmod Record 37.4 (2009): 62-68. http://sigmodrecord.org/publications/sigmodRecord/0812/p062.special.weld.pdf
Nakashole, Ndapandula, Gerhard Weikum, and Fabian Suchanek. “PATTY: a taxonomy of relational patterns with semantic types.” Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning. Association for Computational Linguistics, 2012. https://aclanthology.info/pdf/D/D12/D12-1104.pdf
Banko, M., Cafarella, M. J., Soderland, S., Broadhead, M., & Etzioni, O. (2007, January). Open information extraction from the web. In IJCAI (Vol. 7, pp. 2670-2676). http://www.aaai.org/Papers/IJCAI/2007/IJCAI07-429.pdf
Del Corro, Luciano, and Rainer Gemulla. “Clausie: clause-based open information extraction.” Proceedings of the 22nd international conference on World Wide Web. ACM, 2013. https://people.mpi-inf.mpg.de/~corrogg/publications/delcorro13clausie.pdf
Zhang, Sheng, Rachel Rudinger, and Benjamin Van Durme. “An evaluation of PredPatt and Open IE via stage 1 semantic role labeling.” IWCS 2017—12th International Conference on Computational Semantics—Short papers. 2017. http://www.aclweb.org/anthology/W17-6944
(if you are completely lost, start here!)
Banko, M., Cafarella, M. J., Soderland, S., Broadhead, M., & Etzioni, O. (2007, January). Open information extraction from the web. In IJCAI (Vol. 7, pp. 2670-2676). http://www.aaai.org/Papers/IJCAI/2007/IJCAI07-429.pdf
Nakashole, Ndapandula, Gerhard Weikum, and Fabian Suchanek. “PATTY: a taxonomy of relational patterns with semantic types.” Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning. Association for Computational Linguistics, 2012. https://aclanthology.info/pdf/D/D12/D12-1104.pdf