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 slow caresses that were intended to warm and stir his sleeping beauty increased to a frantic diagnostic check.
answer:
Plural


question:
The human race needs things inventing constantly in order to evolve.
answer:
Singular


question:
The wolves didn't return.
answer:

Plural