For comparison purposes, we utilize the same test set with 40 newswire articles (672 sentences), the same development set with 30 other documents (836 sentences) and the same training set with the remaning 529 documents (14,849 sentences) as the previous studies on this dataset (Ji and Grishman, 2008; Liao and Grishman, 2010;<cite> Li et al., 2013b)</cite> .