In this task you are given a sentence. You must judge whether the object of the main clause is singular(like: apple) or plural(like: apartments). Label the instances as "Singular" or "Plural" based on your judgment.

But I was trapped, I had signed a document when I had joined the yard.
Singular

" About a dozen. "
Singular

Knowing Mason, who never stressed about anything, he'd probably written the speech last night.

Singular