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 concepts formed a vague semi circle around Fate, only Irony grumbled about it.

SOLUTION: Plural

PROBLEM: " What's madness is that with a push of a button, they can knock us all out within seconds. "

SOLUTION: Singular

PROBLEM: " There's a third-rate ski resort near your western border in a town called Winchester.

SOLUTION:
Singular