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: Lake Constance's neighboring countries include St. Gallen, Thurgau, Austria, Germany
Example Output: Lake Constance

Example Input: Swish's corrected time was 4:10:17:42.
Example Output: Swish

Example Input: The sail number of Two True was yc400.
Example Output:
Two True