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: At his death, the healers whispered that he had been poisoned.

SOLUTION: Plural

PROBLEM: But at least his current efforts to make up for his mistakes were paying off.

SOLUTION: Plural

PROBLEM: " A protection racket is where the... " Ben's father didn't need the explanation, so he cut him off.

SOLUTION:
Singular