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: Hands could have managed it, but nobody else had a fraction of his skill.

SOLUTION: Plural

PROBLEM: His technique was one of confident expertise.

SOLUTION: Singular

PROBLEM: There was a tour to some spectacular cliff face called Moher, which was meant to be one of the Wonders of the World.

SOLUTION:
Singular