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.

Q: A printed strip of paper clicked out.

A: Singular
****
Q: The agony on her face reminds me exactly why I didn't want to let her know.

A: Singular
****
Q: The mechanism operating this sluice was not yet complete -- a part for the mechanism had been delayed -- so the sluice remained closed.

A:
Singular
****