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: " Dogs can be a nuisance. "

SOLUTION: Plural

PROBLEM: Her aura, which moments before was clear and bright, was suddenly cloudy with a burst of mustard color.

SOLUTION: Singular

PROBLEM: " His instincts won't come into play until he's born. "

SOLUTION:
Plural