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: He hoped she'd stay, hoped they could explore the possibilities.

SOLUTION: Plural

PROBLEM: His footsteps echoed like a death knell when he walked away.

SOLUTION: Plural

PROBLEM: The black stake went skittering across the rough stone floor.

SOLUTION:
Singular