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: After what seemed to be a long opening round in the beginning of a great battle, the gunmen ceased fire.

Answer: Plural

Question: Looks like he found it in spades here.

Answer: Plural

Question: All materials including photos, illustrations, diagrams and character names are subject to copyright.

Answer:
Plural