1. 20q,
http://www.20q.net
2. Charniak, E.: Statistical parsing with a context-free grammar and word statistics. In: Proc. AAAI 1997, pp. 598–603 (1997)
3. Chomsky, N.: Remarks on nominalization. In: Jacobs, R., Rosenbaum, P. (eds.) Readings in English Transformational Grammar, pp. 184–221 (1970)
4. Collins, M.: Head-driven statistical models for natural language parsing. Computational Linguistics 29(4), 589–637 (2003)
5. Fodor, J.A.: The Language of Thought. Crowell Press (1975)