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: barbara cook (october 25, 1927 – august 8, 2017) was an american singer and actress.

SOLUTION: barbara cook

PROBLEM: zirconium is a chemical elemental metal.

SOLUTION: zirconium

PROBLEM: a breed is a domesticated race or type of an animal or plant.

SOLUTION:
breed