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: the gandaki river is one of the major rivers of nepal.

SOLUTION: gandaki river

PROBLEM: david evan mcmullin (born on april 2, 1976) is a former cia operations officer and independent presidential candidate.

SOLUTION: evan mcmullin

PROBLEM: the institute for research on public policy (irpp; ) is canada's oldest non-partisan public policy think tank.

SOLUTION:
institute for research on public policy