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Qcri @ Trec 2011: Microblog Track QCRI @ TREC 2011: Microblog TrackAli El-Kahki, Kareem DarwishQatar Computing Research Institute, Qatar [email protected], [email protected] AbstractThis paper briefly describes the Qatar Computing Research Institute (QCRI) participation in the TREC 2011 Microblog track. The focus of our TREC submissions was on using a generative graphic model to perform query expansion. We.