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: Again, congratulations passed back and forth until a happy silence fell back on the room.

SOLUTION: Plural

PROBLEM: Just then, the gates raised open, seeming to almost obey Max's command.

SOLUTION: Plural

PROBLEM: Summoning supernatural creatures wasn't an easy task, especially with no physical spell components to aid me.

SOLUTION:
Plural