15. CoNLL 2011:
Portland, Oregon, USA - Shared Task
Sameer Pradhan,
Mitchell P. Marcus,
Martha Palmer,
Lance A. Ramshaw,
Ralph M. Weischedel,
Nianwen Xue:
Proceedings of the Fifteenth Conference on Computational Natural Language Learning: Shared Task, CoNLL 2011, Portland, Oregon, USA, June 23-24, 2011. ACL 2011, ISBN
978-1-937284-08-4 Front Matter.
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