TREC 2005 Enterprise Track Results from Drexel
Weizhong Zhu, Robert B. Allen, Min Song · 2005
The primary goal of Discussion Search is to identify a discussion about a topic. A secondary goal is to determine whether a given message expresses pro or con arguments with respect to the discussion. We employed a combination of POS-driven query expansion and a textclassification technique from [6]. The results of those previous experiments indicated that the technique best performed in extracting protein-protein interaction pairs from MEDLINE. The original email corpus was extremely heterogeneous. We first applied the Tidy HTML parser to strip tags and to identify data such as the sender, thread history, and subject of the messages. We then linked messages into threads in two ways. The corpus provides thread index files for email communications. These thread indexes are composed of hieratically structured multiple discussion threads and single thread. For multiple discussion threads, we unified them into a thread document. We also combined single documents when they had the same subject. 1.1 Method This is a supervised because the system was developed a small set of training data by taking a subset of discussion threads and manually tagging them. We developed a discussion thread