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.

Input: Consider Input: The runway length of Athens International Airport is 4000.0.

Output: Athens International Airport


Input: Consider Input: The leader of Birmingham is the Conservative Party (UK).

Output: Birmingham


Input: Consider Input: Aenir is a paperback.


Output: Aenir