%0 Conference Proceedings
%T Cross-document Event Extraction and Tracking: Task, Evaluation, Techniques and Challenges
%A Ji, Heng
%A Grishman, Ralph
%A Chen, Zheng
%A Gupta, Prashant
%Y Angelova, Galia
%Y Mitkov, Ruslan
%S Proceedings of the International Conference RANLP-2009
%D 2009
%8 September
%I Association for Computational Linguistics
%C Borovets, Bulgaria
%F ji-etal-2009-cross
%U https://aclanthology.org/R09-1032/
%P 166-172