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: Mondelez International was founded in Chicago.
Example Output: Mondelez International

Example Input: Lawrence H. Fountain is part of democratic.
Example Output: Lawrence H. Fountain

Example Input: Shenzhen is part of Guangzhou's built-up area.
Example Output:
Shenzhen