We discuss the development and implementation of an approach for cross-document, cross-lingual event coreference for the DEFT Rich Entities, Relations and Events (Rich ERE) annotation task. Rich ERE defined the notion of event hoppers to enable intuitive within-document coreference for the DEFT event ontology, and the expansion of coreference to cross-document, cross-lingual event mentions relies crucially on this same construct. We created new annotation guidelines, data processes and user interfaces to enable annotation of 505 documents in three languages selected from data already labeled for Rich ERE, yielding 389 cross-document event hoppers. We discuss the data creation process and the central role of event hoppers in making cross-document, cross-lingual coreference decisions. We present the challenges encountered during annotation along with three directions for future work.
@InProceedings{SONG18.974, author = {Zhiyi Song and Ann Bies and Justin Mott and Xuansong Li and Stephanie Strassel and Christopher Caruso}, title = "{Cross-Document, Cross-Language Event Coreference Annotation Using Event Hoppers}", booktitle = {Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)}, year = {2018}, month = {May 7-12, 2018}, address = {Miyazaki, Japan}, editor = {Nicoletta Calzolari (Conference chair) and Khalid Choukri and Christopher Cieri and Thierry Declerck and Sara Goggi and Koiti Hasida and Hitoshi Isahara and Bente Maegaard and Joseph Mariani and Hélène Mazo and Asuncion Moreno and Jan Odijk and Stelios Piperidis and Takenobu Tokunaga}, publisher = {European Language Resources Association (ELRA)}, isbn = {979-10-95546-00-9}, language = {english} }
Summary of the paper