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 demon leader turned to Z. " Are you fighting with us ? "

SOLUTION: Singular

PROBLEM: The marine layer was far off the coast, giving the sun the opportunity to shine and the temperature to reach the high seventies.

SOLUTION: Singular

PROBLEM: The intruder had kindly swept the contents of my desk into a pile on the floor.

SOLUTION:
Singular