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: Greece leader name is Alexis Tsipras.
Example Output: Greece

Example Input: Charles Adermann was first elected in 1943.
Example Output: Charles Adermann

Example Input: 2010 Formula BMW Europe season : Driver name is Dustin Sofyan, Rounds is 5
Example Output:
Dustin Sofyan