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: Ahead he could see two Agents, one on either side of the doors.

Answer: Plural


Question: Other couples and singles sat at a long, curved bar, some with drinks in their hands.

Answer: Plural


Question: Its effects, however took that many years.

Answer:
Plural