D-Tree Grammars Owen Rambow author K Vijay-Shanker author David Weir author 1995-06 text 33rd Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Cambridge, Massachusetts, USA conference publication rambow-etal-1995-tree 10.3115/981658.981679 https://aclanthology.org/P95-1021/ 1995-06 151 158