We observed that the cross-sentence causal relation classifier is usually not as capable as the intrasentence classifier, probably due to less contextual evidence to rely on.
for crosssentence event mention pairs that can be converted to intra-sentence cases through event coreference links, we use a heuristic method to improve causal relation prediction performance and replace the predictions from the cross-sentence classifier with the predictions from the intra-sentence classifier 5 , by using system predicted event coreference links.