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.
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Question: I couldn't see Russ anymore, couldn't even hear his screams over the grinding of the massive machine.

Answer: Singular


Question: Another bump nearly sent him back to the floor.

Answer: Singular


Question: Questions buzzed through her mind.

Answer:
Plural