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: Thinking of it made Elaina snort -- as if he had any choice !

SOLUTION: Singular

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: Romulus yanked him to his feet and pushed him up on the other horse.

SOLUTION:
Plural