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: Your fears are groundless.

SOLUTION: Plural

PROBLEM: Their footsteps rang out on the concrete floor.

SOLUTION: Plural

PROBLEM: Something momentous had just happened to him and damned if he could make sense of it standing in a crowded parking lot.

SOLUTION:
Plural