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: In 2000, he placed 7th in the mass start competition.
Example Output: 2000

Example Input: A Long Long Way comes from Ireland.
Example Output: A Long Long Way

Example Input: Administrative Science Quarterly has the ISSN number of 0001-8392.
Example Output:
Administrative Science Quarterly