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: Sean snapped his head up to look at the Fae, but he was gone, the clearing empty.

SOLUTION: Singular

PROBLEM: " Where are the wipers ? "

SOLUTION: Plural

PROBLEM: In the 20th century, great civil rights leaders like Mohandas Gandhi and Martin Luther King proved that irrefutably.

SOLUTION:
Plural