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 contract is one of the best. "

SOLUTION: Singular

PROBLEM: Plans, ideas, were racing through his head.

SOLUTION: Plural

PROBLEM: The teacher did not even bother quieting them down.

SOLUTION:
Singular