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: My eyelids finally abandoned their fight, and I woke up.

SOLUTION: Plural

PROBLEM: A growl brought her attention to the remaining problem.

SOLUTION: Singular

PROBLEM: The two captains collapsed to the ground, clutching their chests.

SOLUTION:
Plural