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: jujutsu (柔術, jūjutsu) is an ancient japanese martial art.

SOLUTION: jujutsu

PROBLEM: kraft foods is a business that makes packaged food.

SOLUTION: kraft foods

PROBLEM: diana ross is a famous american soul and pop singer.

SOLUTION:
diana ross