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: Flames burned high in shades of grey and white.

SOLUTION: Plural

PROBLEM: Others worried it might be a move to cancel Ares 4 and 5.

SOLUTION: Plural

PROBLEM: Outside temperature is 45 degrees, zero wind. "

SOLUTION:
Plural