Somewhat unfortunately, simplifying assumptions have to be made when a sentence containing multiple noncoreferent event mentions is encountered.
feature 1 encodes whether c t and e t , the trigger words of c and e, satisfy any of the following three conditions: 1. c t and e t are lexically identical; 2. c t and e t contain the same basic verb (BV) and their verb structures are compatible; 3. the similarity between c t and e t is greater than a certain threshold (which we set to 0.8 in our experiments).