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 center Elder finished what sounded like an ancient proverb.

SOLUTION: Singular

PROBLEM: A rustling sounded from the lounger beside her as Hillary stood.

SOLUTION: Singular

PROBLEM: Also prison would be a real possibility because they don't defend killing within your own faction.

SOLUTION:
Singular