Advances in multilingual and multimodal information retrieval: 8th Workshop of the Cross-Language Evaluation Forum, CLEF 2007, Budapest, Hungary, September 19-21, 2007: revised selected papers - Carol Peters (ed. lit.); Valentin Jijkoun (ed. lit.); Thomas Mandl (ed. lit.); Henning Müller (ed. lit.); Douglas W. Oard (ed. lit.); Anselmo Peñas Padilla (ed. lit.); Vivien Petras (ed. lit.); Diana Santos (ed. lit.) (2008)