TASK DEFINITION: In this task you are given a sentence. You must judge whether the object of the main clause is singular(like: apple) or plural(like: apartments). Label the instances as "Singular" or "Plural" based on your judgment.
PROBLEM: It has a knob on top and may have with numbers on it. "

SOLUTION: Singular

PROBLEM: He used duct tape from the garage to tape the two cubes to the bottom of Matthew's shoes.

SOLUTION: Singular

PROBLEM: Luther gave a final scowl toward the closed door, then turned his attention back to Sarah.

SOLUTION:
Singular