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: After what seemed to be a long opening round in the beginning of a great battle, the gunmen ceased fire.

SOLUTION: Plural

PROBLEM: His attempts to remain secluded failed with every head turned in his direction.

SOLUTION: Plural

PROBLEM: Muscles developed by years of hard ranch work padded his shoulders and chest and his stomach was taut with ridges of toned sinew.

SOLUTION:
Plural