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.

The email, as it was open and apparently unfinished, could have easily been a clue as to the whereabouts of General White and his family.
Singular

" Dogs can be a nuisance. "
Plural

The suns were high and the tribe was enjoying a mid-morning meal.

Plural