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 dog promptly dropped to a sitting position, his tail still wagging furiously.

SOLUTION: Singular

PROBLEM: My eyelids are heavy, my fingers and toes sting with cold.

SOLUTION: Plural

PROBLEM: The gold coin appeared out of thin air.

SOLUTION:
Singular