Spring 2012 IA165 Combinatory Logic for Computational Semantics by Juyeon Kang
Classwork N°8
due to 20th April 2012
Exercise: “Application of combinators to natural language analysis: Passivisation”
1. There are couples of the sentences having the paraphrastic relations. What is the
relation of these two sentences? What is the invariant of meaning of them? Please show
and explain it using the combinators.
(a.1) He opened the door.
(a.2) The door was opened
(b.1) Anna gave the money to John.
(b.2) The money was given to John by Anna.
(c.1) The police chases the car.
(c.2) The car flees the police.
(d.1) I sent a card to my mother.
(d.2) My mother received a card from me.
2. Define and apply the operators of the passivisation to the following sentences in
Czech.
(e.1) Petr chválí Pavla (Peter praises Paul)
(e.2) Pavel je chválen Petrem (Paul is praised by Peter)
Spring 2012 IA165 Combinatory Logic for Computational Semantics by Juyeon Kang
(f.1) To okno bylo rozbito včera. (Kdo to udělal?)
→ The window was broken yesterday
(f.2) To okno se rozbilo včera. (*Kdo to udělal?) (!REFLEXIVISATION!)
→ The window broke (itself) yesterday