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: Battsengel mangolian population 3818
Example Output: Battsengel

Example Input: The show's time slot during season 3 was Tuesday 8:30 pm.
Example Output: 3

Example Input: American Journal of Mathematics has the OCLC number 1480153.
Example Output:
American Journal of Mathematics