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: Dadagiri came out in 1987.
Example Output: 1987

Example Input: The population of Guangzhou's urban area is 11,070,654.
Example Output: Guangzhou

Example Input: Lin Dan won the men's singles in 2009.
Example Output:
2009