An evaluated semantic query expansion and structure-based approach for enhancing Arabic question/answering
Lahsen Abouenour, Karim Bouzouba, Paolo Rosso · 2010
This paper describes an approach for improving the re- ranking of passages for Arabic Question/Answering (Q/A). This approach implements a process performing a semantic Query Expansion (QE) based on the Arabic WordNet (AWN) ontology with a structure-based Passage Retrieval (PR) based on the Distance Density n-gram model. Experiments with a set of translated CLEF and TREC questions have shown that the accuracy, the Mean Reciprocal Rank and the number of answered questions have been significantly improved using our approach. These experiments have been conducted in an open domain by querying the web as document collection. An analysis of the obtained performances is discussed in this paper.