Q2. What is the meaning of r e / a n d n?
The relations r e / a n d nn are treated here as predicate variables, but they could be treated as predicate constants, in which case the authors would not have quantified over them.
Q3. What is the meaning of s(O, n, e)?
Implementations of different orders of interpretation, or different sorts of interaction among syntax, compositional semantics, and local pragmatics, can then be seen as different orders of search for a proof of s(O, n, e).
Q4. What are the main components of the study?
In addition to type checking, the authors have introduced two other tevhnlques that are necessary for controlling the exploslon~unwinding recursive axioms and making use of syntactic noncoreference information.
Q5. What is the syntax of the sentence?
Syntax is captured in predicates like np, vp, and s. Compositional semantics is encoded in, for example, the way the predicat e p' is applied to its arguments in the first axiom, and in the lambda expression in the third argument of vp in the third axiom.
Q6. What is the syntax portion of the grammar?
The syntax portion is represented in standard Prolog manner, with nonterminals treated as predicates and having as two of its arguments the beginning and end points of the phrase spanned by the nonterminal.