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: 2nd Amendment was a Jive Records song.
Example Output: 2nd Amendment

Example Input: John van den Brom is a player in İstanbulspor A.Ş.
Example Output: John van den Brom

Example Input: 320 South Boston Building was formerly called the Exchange National Bank Building.
Example Output:
320 South Boston Building