PolyU at TAC 2008

摘要

PolyU has participated in three of the TAC 2008 tasks, including the update text summarization track, the opinion text summarization track and the query answering track. We submitted three independent systems for these tracks. Thus the details of the opinion summarization track and the QA track are introduced in the following sections respectively. The opinion summarization track is a complex task which involves query answering, multi-document summarization and opinion analysis. It requires producing short coherent summaries of the answers to some opinion-oriented questions from associated blog documents. Text snippets of the documents output by QA systems are also provided. We follow a typical feature-based framework to build systems to adapt the multi-purpose task. The system is implemented by extracting the salient sentences from the original documents to form the summary. The sentences are selected through a two-phase process considering both the paragraphs and sentences.