engleski

Constructing Coherent Event Hierarchies from News Stories

News describe real-world events of varying granularity, and recognition of internal structure of events is important for automated reasoning over events. We propose an approach for constructing coherent event hierarchies from news by enforcing document-level coherence over pairwise decisions of spatiotemporal containment. Evaluation on a news corpus annotated with event hierarchies shows that enforcing global spatiotemporal coreference of events leads to significant improvements (7.6% F1-score) in the accuracy of pairwise decisions

event hierarchy; integer linear programming; spatiotemporal containment

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