Using a Trie-based Structure for Question Analysis

This paper presents an approach for question analysis that deflnes the question subject and its required answer type by building a trie- based structure from a set of question patterns. The question analysis consists of comparing the question tokens with the path of nodes in the trie. A look-ahead process solve the mismatches of unknown words by assigning a entity-type or semantically linking them with other question words. The developed approach is evaluated using difierent datasets showing that its perfor- mance is comparable with state-of-the-art sys- tems.