Efficient algorithm for Context Sensitive Aggregation in Natural Language generation Hemanth Sagar Bayyarapu author 2011-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing 2011 Ruslan Mitkov editor Galia Angelova editor Association for Computational Linguistics Hissar, Bulgaria conference publication bayyarapu-2011-efficient https://aclanthology.org/R11-1012/ 2011-09 84 89