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: Things were about to get difficult.

SOLUTION: Plural

PROBLEM: Their shared orgasm left them spent and still connected, hugging each other while their breathing slowly returned to normal.

SOLUTION: Singular

PROBLEM: The detector at his belt beeped.

SOLUTION:
Singular