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.

Ahead of the ship, the relatively calm seas were washing against slate grey rocks that rose seven or eight feet up out of the waters.
Plural

Sean snapped his head up to look at the Fae, but he was gone, the clearing empty.
Singular

His tone softened, his movements became more gentle.

Plural