Unsupervised named entity recognition using syntactic and semantic contextual evidence

  • Authors:
  • Alessandro Cucchiarelli;Paola Velardi

  • Affiliations:
  • Università di Ancona;Università di Roma 'La Sapienza'

  • Venue:
  • Computational Linguistics
  • Year:
  • 2001

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Abstract

Proper nouns form an open class, making the incompleteness of manually or automatically learned classification rules an obvious problem. The purpose of this paper is twofold: first, to suggest the use of a complementary "backup" method to increase the robustness of any hand-crafted or machine-learning-based NE tagger; and second, to explore the effectiveness of using more fine-grained evidence--namely, syntactic and semantic contextual knowledge---in classifying NEs.