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: Addis Ababa City Hall is located in the country of Ethiopia.
Example Output: Addis Ababa City Hall

Example Input: Thomas Plater is a Federalist.
Example Output: Thomas Plater

Example Input: ACM Transactions on Information Systems is part of the academic Discipline of Computer Science.
Example Output:
ACM Transactions on Information Systems