A Method of Extract News Events Based on Three Level Models

In this paper, the method ofextract event from newspaper is proposed. First, the candidate sentences are select by using trigger word. Then, statistic models in three levels are consisted of extract model, which is sentences level, news level and topic level is used to extract event from candidate sentences and the probability of extracted events is calculated by three levels model. Finally, the method proposed in this paper is used to extract 4 type events. The experiment result shows this method have ideal effect on event extraction.