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ACM Transactions on Information Systems (TOIS), Volume 25 Issue 2, April 2007

An exploration of the principles underlying redundancy-based factoid question answering
Jimmy Lin
Article No.: 6
DOI: 10.1145/1229179.1229180

The so-called “redundancy-based” approach to question answering represents a successful strategy for mining answers to factoid questions such as “Who shot Abraham Lincoln?” from the World Wide Web. Through contrastive...

Evaluating the accuracy of implicit feedback from clicks and query reformulations in Web search
Thorsten Joachims, Laura Granka, Bing Pan, Helene Hembrooke, Filip Radlinski, Geri Gay
Article No.: 7
DOI: 10.1145/1229179.1229181

This article examines the reliability of implicit feedback generated from clickthrough data and query reformulations in World Wide Web (WWW) search. Analyzing the users' decision process using eyetracking and comparing implicit feedback against...

Soft pattern matching models for definitional question answering
Hang Cui, Min-Yen Kan, Tat-Seng Chua
Article No.: 8
DOI: 10.1145/1229179.1229182

We explore probabilistic lexico-syntactic pattern matching, also known as soft pattern matching, in a definitional question answering system. Most current systems use regular expression-based hard matching patterns to identify definition...

Automatic classification of Web queries using very large unlabeled query logs
Steven M. Beitzel, Eric C. Jensen, David D. Lewis, Abdur Chowdhury, Ophir Frieder
Article No.: 9
DOI: 10.1145/1229179.1229183

Accurate topical classification of user queries allows for increased effectiveness and efficiency in general-purpose Web search systems. Such classification becomes critical if the system must route queries to a subset of topic-specific and...