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: Alexis headed back to her room.

SOLUTION: Plural

PROBLEM: " Almost drowning was pretty scary, huh ? "

SOLUTION: Singular

PROBLEM: There's mirroring software on here so that whatever she was looking at on her monitor was being projected onto the other user's computer.

SOLUTION:
Singular