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.

Example Input: Massimo Drago played for S.S.D. Potenza Calcio.
Example Output: Massimo Drago

Example Input: Al Simmons, who plays defence, was chosen during the 1971 NHL Amateur Draft, round seven.
Example Output: Al Simmons

Example Input: The third runway length of Andrews County Airport is 2,939 feet.
Example Output:
Andrews County Airport