The CLEF semi-recursive generation algorithm Rodrigo Reyes author 2000-06 text INLG’2000 Proceedings of the First International Conference on Natural Language Generation Michael Elhadad editor Association for Computational Linguistics Mitzpe Ramon, Israel conference publication reyes-2000-clef 10.3115/1118253.1118286 https://aclanthology.org/W00-1431/ 2000-06 231 238