31 Jesús Herrera Anselmo Peñas Felisa Verdejo Alexander Gelbukh 2004 Spanish Question Answering Evaluation Computational Linguistics and Intelligent Text Processing. 5th International Conference CICLing 2004. Proceedings Seoul, Korea Springer 2945 472--483 Lecture Notes in Computer Science 03/2004 978-3-540-21006-1 question answering spanish evaluation