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: The Flash Size of the AT90S4414 Chip is 4k.
Example Output: AT90S4414

Example Input: The leader of Japan is Shinzō Abe.
Example Output: Japan

Example Input: Birger Ruud won 1931, 1932, 1935, 1936, 1937, 1948 the FIS Nordic World Ski Championships.
Example Output:
Birger Ruud