Time for the whole enchilada: the classic CHAT-80 system.
And for the very very keen:
Pereira, Fernando. Logic For Natural Language Analysis, Technical Note 275. AI Center, SRI International, 333 Ravenswood Ave., Menlo Park, CA 94025, Jan 1983.
"This work investigates the use of formal logic as a practical tool for describing the syntax and semantics of a subset of English, and building a computer program to answer data base queries expressed in that subset. To achieve an intimate connection between logical descriptions and computer programs, all the descriptions given are in the definite clause subset of the predicate calculus, which is the basis of the programming language Prolog. The logical descriptions run directly as efficient Prolog programs."