Representation and Reasoning for Deeper Natural Language Understanding in a Physics Tutoring System. Makatchev, M., VanLehn, K., Jordan, P. W., & Pappuswamy, U. In Proceedings of the 19th International FLAIRS Conference, pages 682–687, 2006.
bibtex   
@inproceedings{makatchev06,
	author = {Maxim Makatchev and Kurt VanLehn and Pamela W. Jordan and Umarani Pappuswamy},
	booktitle = {Proceedings of the 19th International FLAIRS Conference},
	pages = {682--687},
	title = {Representation and Reasoning for Deeper Natural Language Understanding in a Physics Tutoring System},
	year = {2006}}

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