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 three figures clumped across the dormitory.

SOLUTION: Plural

PROBLEM: A girl's first adult gown is a special garment -- one that she will feel connected to for the rest of her life.

SOLUTION: Singular

PROBLEM: If she continued this pace much longer, their deaths could very well be at her hand.

SOLUTION:
Plural