instruction:
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.
question:
A loud boom shook through the ship, shaking more frost atop them.
answer:
Singular


question:
The goal of the Academy was to train children discipline, and make sure they got a top-notch education and leadership skills.
answer:
Singular


question:
Then his nostrils flared.
answer:

Plural