UDel: Named Entity Recognition and Reference Regeneration from Surface Text Nicole Sparks author Charles Greenbacker author Kathleen McCoy author Che-Yu Kuo author 2010-07 text Proceedings of the 6th International Natural Language Generation Conference John Kelleher editor Brian Mac Namee editor Ielka van der Sluis editor Association for Computational Linguistics conference publication sparks-etal-2010-udel https://aclanthology.org/W10-4232/ 2010-07