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.

[EX Q]: Vidarabine (Ara-A)'s trademark is Vira-A ®
[EX A]: Vidarabine (Ara-A)

[EX Q]: Episode "show 32" is in Garfield Episode 2 crime and nourishment
[EX A]: show 32

[EX Q]: Alan Shepard was the Chief of the Astronaut Office in 1963.
[EX A]:
Alan Shepard