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: pablo escobar and his brother's school once sent them home because they had no shoes and no money to buy them.

SOLUTION: pablo escobar

PROBLEM: zinc phosphate is a chemical compound.

SOLUTION: zinc phosphate

PROBLEM: archelon was a huge marine turtle (testudines) that was the size of a car.

SOLUTION:
archelon