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 instincts rarely proved wrong.

SOLUTION: Plural

PROBLEM: The opening strains of a Strauss waltz filled the room, and the dancers looked about in confusion.

SOLUTION: Plural

PROBLEM: The sirens started to blare, which should have scared her, except that they were the only thing that gave her any hope.

SOLUTION:
Plural