UNC-CH at DUC 2007: Query Expansion, Lexical Simplification and Sentence Selection Strategies for Multi-Document Summarization
Catherine L. Blake, Julia Kampov, Andreas K. Orphanides, David C. West, Cory Lown · 2007
This paper describes the approach used in the UNC-CH system to generate a topicfocused summary of information reported in multiple news articles. We explored query expansion, lexical simplification and sentence simplification. Results suggest that cluster membership plays an important role in improving summarization performance, while query expansion does not. The UNC-CH system performed well in both automated and manual evaluations, achieving the 12 th highest ROUGE-2 score and a score greater than or equal to the average system responsiveness score for 30 of the 45 DUC 2007 topics. 1