Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

[EX Q]: in law, a conviction is the verdict that results when a court of law finds a defendant guilty of a crime.
[EX A]: conviction

[EX Q]: institut d'optique graduate school (supoptique) is a renowned graduate engineering school in france.
[EX A]: institut d'optique graduate school

[EX Q]: a wrecking ball is a heavy steel ball used for demolishing large buildings.
[EX A]:
wrecking ball