Spring 2012 IA165 Combinatory Logic for Computational Semantics by Juyeon Kang
Classwork N°10
due to 4th May 2012
Exercise: “Application of combinators to natural language analysis: aspecto-temporal
analysis”
1. Derived combinators
We introduce the powers of a combinator Xn
and the deferred combinators Xn, where the
X is a combinator.
(a) B5C2B2
CB2
x y z f g
(b) B3(C2B2
) x y z f g
(c) C3B2B x y z f
(d) (B2
C3)BB2
C x y z f g
2. Introduction of the aspecto-temporal operators.
Give the representation of the following discourses by using the aspecto-temporal
operators; STATE(O), EVENT(F), PROC(J), I-SAY.
Dialogue a.
This morning, a car accident occurred (on a certain street intersection). A  
man hit someone with his red car and flew away. The police chase the red 
car (at this moment).
Dialogue b.
Anna is explicating the reason for being late (to her boss): “ I went to the garage. And I
found that I forgot to put oil in the car. So I have taken the bus.”(Lascarides and Asher, 1993)
(1) Give the predicate-argument structure of the sentences
Spring 2012 IA165 Combinatory Logic for Computational Semantics by Juyeon Kang
(2) Define the temporal relations between the sentences and formalize it
(3) Try to establish the enunciative schemes of the given dialogues