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: Most visitors landed at a nearby regional airport or rented a car at some major airport, like Philadelphia.

SOLUTION: Plural

PROBLEM: Its fur was mottled gray and cream ( like a case of mange, Michael said ), and its left eye had a permanent squint.

SOLUTION: Singular

PROBLEM: " Nuclear radiation did this ? "

SOLUTION:
Singular