Event Extraction by Answering (Almost) Natural Questions
Table 5: Effect of questioning strategy for trigger detection.
['[EMPTY]', 'Trigger ID + Classification P', 'Trigger ID + Classification R', 'Trigger ID + Classification F1']
By leaving empty, we mean instantiating the question with empty string. There’s no substantial gap between different alternatives. By using “verb” as the question, our BERT_QA_Trigger model achieves best performance (measured by F1 score).