1. Akbik A, Löser A (2012) Kraken: N-ary facts in open information extraction. In: Proceedings of the AKBC-WEKEX, ACL, pp 52–56
2. Banko M, Cafarella MJ, Soderland S, Broadhead M, Etzioni O (2007) Open information extraction for the web. Proc IJCAI 7:2670–2676
3. Banko M, Etzioni O, Center T (2008) The tradeoffs between open and traditional relation extraction. In: Proceedings of the ACL, ACL, vol 8, pp 28–36
4. Bast H, Haussmann E (2013) Open information extraction via contextual sentence decomposition. In: Proceedings of the ICSC, IEEE, pp 154–159
5. Bast H, Haussmann E (2014) More informative open information extraction via simple inference. In: Proceedings of the ECIR, Springer, pp 585–590