instruction:
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.
question:
The large mansions, which lined both sides of the street, bore stately and placid witness to their conversation.
answer:
Plural

question:
Resistance then generally collapsed and the criminal gangs nearly all turned themselves in.
answer:
Singular

question:
Forward thinking minds as advanced as these may only come along every fifty to one hundred years.
answer:
Plural