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.
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Question: He grinned, a sudden whiteness in the dark.

Answer: Plural


Question: My assailant picks up the crossbow and backs away a few steps.

Answer: Singular


Question: I hand her my logbook pen and she sits down.

Answer:
Singular