Multilingual CALL Framework for Automatic Language Exercise Generation from Free Text Naiara Perez author Montse Cuadros author 2017-04 text Proceedings of the Software Demonstrations of the 15th Conference of the European Chapter of the Association for Computational Linguistics André Martins editor Anselmo Peñas editor Association for Computational Linguistics Valencia, Spain conference publication perez-cuadros-2017-multilingual https://aclanthology.org/E17-3013/ 2017-04 49 52