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: Finally the credits rolled on the screen.

SOLUTION: Plural

PROBLEM: Her furious tirade was almost the equal of the outburst when she first learned her pearls were missing.

SOLUTION: Singular

PROBLEM: Great warriors and wizards have failed. "

SOLUTION:
Plural