Prototype Machine Translation System From Text-To-Indian Sign Language Tirthankar Dasgupta author Sandipan Dandpat author Anupam Basu author 2008 text Proceedings of the IJCNLP-08 Workshop on NLP for Less Privileged Languages conference publication dasgupta-etal-2008-prototype https://aclanthology.org/I08-3006/ 2008