TASK DEFINITION: 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.
PROBLEM: The slow caresses that were intended to warm and stir his sleeping beauty increased to a frantic diagnostic check.

SOLUTION: Plural

PROBLEM: Despair might be the tune he sang to himself about what he did, but a deep polished vanity lay beneath it.

SOLUTION: Singular

PROBLEM: Aria's footsteps stopped.

SOLUTION:
Plural