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: A printed strip of paper clicked out.

SOLUTION: Singular

PROBLEM: The rows of houses like headstones in a cemetery.

SOLUTION: Plural

PROBLEM: " The trick is to add just a pinch.

SOLUTION:
Singular