Who is Who and What is What: Experiments in Cross-Document Co-Reference

This paper describes a language-independent, scalable system for both challenges of crossdocument co-reference: name variation and entity disambiguation. We provide system results from the ACE 2008 evaluation in both English and Arabic. Our English system's accuracy is 8.4% relative better than an exact match baseline (and 14.2% relative better over entities mentioned in more than one document). Unlike previous evaluations, ACE 2008 evaluated both name variation and entity disambiguation over naturally occurring named mentions. An information extraction engine finds document entities in text. We describe how our architecture designed for the 10K document ACE task is scalable to an even larger corpus. Our cross-document approach uses the names of entities to find an initial set of document entities that could refer to the same real world entity and then uses an agglomerative clustering algorithm to disambiguate the potentially co-referent document entities. We analyze how differen...

• Type: Conference
• Year: 2008
• Where: EMNLP
• Authors: Alex Baron, Marjorie Freedman
• Keywords: ACE 2008 Evaluation, Document Entities, EMNLP 2008, Entity Disambiguation, Natural Language Processing