TASK DEFINITION: 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.
PROBLEM: Had his uncle grown forgetful in his old age ?

SOLUTION: Singular

PROBLEM: The rows of houses like headstones in a cemetery.

SOLUTION: Plural

PROBLEM: At that moment a dragon carrying a rider dressed in black and red robes swooped down from the sky toward Azul.

SOLUTION:
Singular