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: Kaisiki Nishada is notated N2.
Example Output: Kaisiki Nishada

Example Input: Hkun law was the heir when the monarch was Wareru.
Example Output: Wareru

Example Input: A Wizard of Mars is published in Hardcover.
Example Output:
A Wizard of Mars