@inproceedings{multilingualcallframeworkforautomatic,
  title = {Multilingual CALL Framework for Automatic Language Exercise Generation from Free Text},
  author = {Naiara Perez and Montse Cuadros},
  year = {2017},
  booktitle = {EACL 2017 4},
  url = {https://aclanthology.org/E17-3013},
}