TASK DEFINITION: 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.
PROBLEM: institut d'optique graduate school (supoptique) is a renowned graduate engineering school in france.

SOLUTION: institut d'optique graduate school

PROBLEM: an part of any of the world's legal systems is impartiality.

SOLUTION: impartiality

PROBLEM: from 1973 until 1998, byrne presented "the gay byrne hour"—later "the gay byrne show" when it expanded to two hours—on rté radio 1 each weekday morning.

SOLUTION:
gay byrne