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

Example Input: Accademia di Architettura di Mendrisio is located in the city of Mendrisio.
Example Output: Accademia di Architettura di Mendrisio

Example Input: Darren Day entered on day 1.
Example Output:
Darren Day