tailieunhanh - Báo cáo khoa học: "Wrapping up a Summary: from Representation to Generation"

The main focus of this work is to investigate robust ways for generating summaries from summary representations without recurring to simple sentence extraction and aiming at more human-like summaries. This is motivated by empirical evidence from TAC 2009 data showing that human summaries contain on average more and shorter sentences than the system summaries. We report encouraging preliminary results comparable to those attained by participating systems at TAC 2009. | Wrapping up a Summary from Representation to Generation Josef Steinberger and Marco Turchi and Mijail Kabadjov and Ralf Steinberger EC Joint Research Centre 21027 Ispra VA Italy @ Abstract The main focus of this work is to investigate robust ways for generating summaries from summary representations without recurring to simple sentence extraction and aiming at more human-like summaries. This is motivated by empirical evidence from TAC 2009 data showing that human summaries contain on average more and shorter sentences than the system summaries. We report encouraging preliminary results comparable to those attained by participating systems at TAC 2009. 1 Introduction In this paper we adopt the general framework for summarization put forward by Sparck-Jones 1999 - which views summarization as a threefold process interpretation transformation and generation - and attempt to provide a clean instantiation for each processing phase with a particular emphasis on the last summary-generation phase often omitted or over-simplified in the mainstream work on summarization. The advantages of looking at the summarization problem in terms of distinct processing phases are numerous. It not only serves as a common ground for comparing different systems and understanding better the underlying logic and assumptions but it also provides a neat framework for developing systems based on clean and extendable designs. For instance Gong and Liu 2002 proposed a method based on Latent Semantic Analysis LSA and later J. Steinberger et al. 2007 showed that solely by enhancing the first source interpretation phase one is already able to produce better summaries. There has been limited work on the last summary generation phase due to the fact that it is unarguably a very challenging problem. The vast Nello Cristianini University of Bristol Bristol bS8 1UB UK nello@ amount of approaches assume simple