Information Access Evaluation. Multilinguality, Multimodality, and Interaction 5th International Conference of the CLEF Initiative, CLEF 2014, Sheffield, UK, September 15-18, 2014. Proceedings - Kanoulas, Evangelos; Lupu, Mihai; Clough, Paul; Sanderson, Mark; Hall, Mark; Hanbury, Allan; Toms, Elaine (Springer International Publishing : Imprint: Springer, 2014)