Utilizing the World Wide Web as an Encyclopedia: Extracting Term   Descriptions from Semi-Structured Texts
  In this paper, we propose a method to extract descriptions of technical terms from Web pages in order to utilize the World Wide Web as an encyclopedia. We use linguistic patterns and HTML text structures to extract text fragments containing term descriptions. We also use a language model to discard extraneous descriptions, and a clustering method to summarize resultant descriptions. We show the effectiveness of our method by way of experiments. 
Atsushi Fujii and Tetsuya Ishikawa