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: The deep boom of the two shots, which had been batting to and fro among the mountains, died away.

A: Singular
****
Q: " Fifty packets, " Kowalski called from the bed.

A: Plural
****
Q: A bullet wouldn't breach a Warden's skin.

A:
Singular
****