Natural Language Processing and Information Systems 21st International Conference on Applications of Natural Language to Information Systems, NLDB 2016, Salford, UK, June 22-24, 2016, Proceedings - Métais, Elisabeth; Meziane, Farid; Saraee, Mohamad; Sugumaran, Vijayan; Vadera, Sunil (Springer International Publishing : Imprint: Springer, 2016)