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: Several minutes later, footsteps sounded across the wooden floor, and Noah joined me at the window.

SOLUTION: Plural

PROBLEM: Many factions in the Lore shared collective property, but the witches were the opposite - everything in the covens was about private ownership.

SOLUTION: Plural

PROBLEM: The principal plays with the paperweight.

SOLUTION:
Singular