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: Or' vote by fraud' as its affectionately called.

SOLUTION: Singular

PROBLEM: Silk's daggers were already doing their deadly work.

SOLUTION: Plural

PROBLEM: The initial thrust has to be provided. "

SOLUTION:
Singular