TAILIEUCHUNG - Báo cáo khoa học: "Fully Abstractive Approach to Guided Summarization"

This paper shows that full abstraction can be accomplished in the context of guided summarization. We describe a work in progress that relies on Information Extraction, statistical content selection and Natural Language Generation. Early results already demonstrate the effectiveness of the approach. 1 Introduction In the last decade, automatic text summarization has been dominated by extractive approaches that rely purely on shallow statistics. In the latest evaluation campaign of the Text Analysis Conference1 (TAC), the top systems were considered only “barely acceptable” by human assessment (Owczarzak and Dang, 2011). The field is also getting saturated near what appears to be a ceiling. | Fully Abstractive Approach to Guided Summarization Pierre-Etienne Genest Guy Lapalme RALI-DIRO Universite de Montreal . Box 6128 Succ. Centre-Ville Montreal Quebec Canada h3c 3J7 genestpe lapalme @ Abstract This paper shows that full abstraction can be accomplished in the context of guided summarization. We describe a work in progress that relies on Information Extraction statistical content selection and Natural Language Generation. Early results already demonstrate the effectiveness of the approach. 1 Introduction In the last decade automatic text summarization has been dominated by extractive approaches that rely purely on shallow statistics. In the latest evaluation campaign of the Text Analysis Conference1 TAC the top systems were considered only barely acceptable by human assessment Owczarzak and Dang 2011 . The field is also getting saturated near what appears to be a ceiling in performance. Systems that claim to be very different from one another have all become statistically indistinguishable in evaluation results. An experiment Genest et al. 2009 found a performance ceiling to pure sentence extraction that is very low compared to regular abstractive human summaries but not that much better than the current best automatic systems. Abstractive summarization has been explored to some extent in recent years sentence compression Knight and Marcu 2000 Cohn and Lapata 2009 sentence fusion Barzilay and McKeown 2005 or revision Tanaka et al. 2009 and a generationbased approach that could be called sentence splitting Genest and Lapalme 2011 . They are all 1 tac 354 rewriting techniques based on syntactical analysis offering little improvement over extractive methods in the content selection process. We believe that a fully abstractive approach with a separate process for the analysis of the text the content selection and the generation of the summary has the most potential for generating summaries at a level comparable to human. For

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