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: Looks like he found it in spades here.

SOLUTION: Plural

PROBLEM: " This medication is not fatal.

SOLUTION: Singular

PROBLEM: A thin plume of smoke snaked from the chimney of the building into the slate gray of the sky.

SOLUTION:
Singular