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 amber liquid gave a satisfying burn as it went down, and a happy warmth starting to tingle in my limbs.

SOLUTION: Singular

PROBLEM: The vote was quick and it passed.

SOLUTION: Singular

PROBLEM: Every so often a puff of smoke escaped into the room leaving a shadowy trail on the wall above the fire.

SOLUTION:
Singular