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: Nina Hagen acted in the 1979 film Cha-Cha.
Example Output: Cha-Cha

Example Input: AIP Advances editors include the following: Vincent H. Crespi, Bernard S. Gerstman, A.T. Charlie Johnson, Masaaki Tanaka, Enge G. Wang.
Example Output: AIP Advances

Example Input: There are 23 floors at 103 Colmore Row.
Example Output:
103 Colmore Row