Information Access Evaluation. Multilinguality, Multimodality, and Visual Analytics [electronic resource] : Third International Conference of the CLEF Initiative, CLEF 2012, Rome, Italy, September 17-20, 2012. Proceedings / edited by Tiziana Catarci, Pamela Forner, Djoerd Hiemstra, Anselmo Peñas, Giuseppe Santucci.