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: In 2007, there was a 0.9% decrease in total passengers.
Example Output: 2007

Example Input: Marriott International was founded in Washington, D.C.
Example Output: Marriott International

Example Input: Grandpa clyde sang the song He's Bigfoot.
Example Output:
He's Bigfoot