TASK DEFINITION: This task is about identifying the subject of a given sentence. The subject of a sentence is the person, place, or thing that is performing the action of the sentence. The subject represents what or whom the sentence is about. Each sentence in this task is guaranteed to contain a single subject. The input is a sentence and the output is the identified subject of that sentence.
PROBLEM: The Atlantic City International Airport serves Atlantic City, N.J.

SOLUTION: Atlantic City International Airport

PROBLEM: The English language is used in the United States.

SOLUTION: United States

PROBLEM: Frank Borman was a member of the crew on Apollo 8.

SOLUTION:
Apollo 8