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: a viola is a musical instrument which is similar to the violin and cello.

SOLUTION: viola

PROBLEM: the corruption perceptions index is an index that shows how corrupt certain countries are.

SOLUTION: corruption perceptions index

PROBLEM: jean-claude wicky (28 january 1946 – 31 july 2016) was a swiss photographer.

SOLUTION:
jean-claude wicky