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: The 11th Mississippi Infantry Monument is located in the United States.
Example Output: 11th Mississippi Infantry Monument

Example Input: The high school Nihon Bunri is located in Niigata.
Example Output: Nihon Bunri

Example Input: Angola International Airport is located at Ícolo e Bengo.
Example Output:
Angola International Airport