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: My father-in-law was so right when he asked me to wait a little with the police.
Example Output: Singular

Example Input: " Where is this maid now ? "
Example Output: Singular

Example Input: The wailing of sirens is continuous, various, piercing as whistles.
Example Output:
Singular