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: Alaminos has a population density of 757.5 per square kilometer.
Example Output: Alaminos

Example Input: The BL34 Locomotive first entered into service in June of 1984.
Example Output: BL34

Example Input: Prapol Pongpanich 2009 in thai foodball club date of departure PEA May 2009.
Example Output:
Prapol Pongpanich