Question-Réponse multilingue : influence du multilinguisme et stratégies

This articles presents a bilingual question answering system, which is able to process questions in French and to find the answer in documents in English (or eventually the other way around). Two cross-langual strategies are described and evaluated, which concern at least the information retrieval steps, but can also be used by the answer extraction module. First, we study the contribution of biterms translation, and the influence of the completion of the translation dictionaries. Then, we propose a strategy for transfering the question analysis from one language to the other, and we study its influence on the performance of our system. MOTS-CLÉS : Question-Réponse, multilinguisme.