In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

Example Input: Then the vigil began.
Example Output: Singular

Example Input: Americus moved over to the tall chimney.
Example Output: Plural

Example Input: That schedule was a work of art : logical, neat, and with plenty of space for contingencies.
Example Output:
Singular