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: His technique was one of confident expertise.

SOLUTION: Singular

PROBLEM: " Twenty pairs of leather boots ?

SOLUTION: Plural

PROBLEM: " Kevin, " the twins said.

SOLUTION:
Plural