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: " His drinks that is, " she added.

SOLUTION: Plural

PROBLEM: The goon caught in the door fell to the ground like a sack of potatoes.

SOLUTION: Singular

PROBLEM: As I pondered that, a long, thick green speckled snake slithered out of the river and coiled itself in front of me.

SOLUTION:
Singular