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: The Undead Guardian himself appeared to rock on his heels.
Example Output: Singular

Example Input: A mass of recruits had already gravitated to the Whites.
Example Output: Singular

Example Input: Sure those expressions were fun for a while but their overuse grew to a point of annoyance.
Example Output:
Plural