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: " My mate is human.

SOLUTION: Singular

PROBLEM: The shadowy grotto had disappeared.

SOLUTION: Singular

PROBLEM: Chills ran races up and down his spine.

SOLUTION:
Plural