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: The lieutenant immediately begins barking out commands to the officers in the room.

SOLUTION: Singular

PROBLEM: " Love's not necessary to a well-matched marriage, " Victoria said firmly, " but it certainly doesn't hurt.

SOLUTION: Singular

PROBLEM: Their family relatives didn't fight in real wars and didn't work to better the condition of the down trodden.

SOLUTION:
Plural