Article révisé par les pairs
Résumé : For CLEF 2018, we focus on cultural microblog search. The aim of this work is to find relevant microcritics in a monolingual and cross lingual context about films. This task is challenging due to the short length of the query and of the documents. For the monolingual context we propose to expand the query using a probalistic weighting scheme. For the French-english cross language task, we used a state of the art approach based on query transation.