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: My father-in-law was so right when he asked me to wait a little with the police.

Answer: Singular

Question: The caller hung up.

Answer: Singular

Question: As it approached, I could see the driver through the windshield, sort of leaning forward, forearms wrapped around the steering wheel, scanning.

Answer:
Plural