Title2Event: Benchmarking Open Event Extraction with a Large-scale Chinese Title Dataset
This addresses the need for better event extraction in news aggregation and knowledge graphs, but it is incremental as it focuses on a specific data source and language.
The paper tackles the problem of event extraction from news titles by introducing Title2Event, a large-scale Chinese dataset with over 42,000 manually annotated titles across 34 topics, and shows that title characteristics pose challenges for existing models.
Event extraction (EE) is crucial to downstream tasks such as new aggregation and event knowledge graph construction. Most existing EE datasets manually define fixed event types and design specific schema for each of them, failing to cover diverse events emerging from the online text. Moreover, news titles, an important source of event mentions, have not gained enough attention in current EE research. In this paper, We present Title2Event, a large-scale sentence-level dataset benchmarking Open Event Extraction without restricting event types. Title2Event contains more than 42,000 news titles in 34 topics collected from Chinese web pages. To the best of our knowledge, it is currently the largest manually-annotated Chinese dataset for open event extraction. We further conduct experiments on Title2Event with different models and show that the characteristics of titles make it challenging for event extraction, addressing the significance of advanced study on this problem. The dataset and baseline codes are available at https://open-event-hub.github.io/title2event.