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.

The festival would last a full day and night before ending -- loud enough to hear even through the thick walls of our house.
Singular

There were two tales that were most prominent.
Plural

The old stone courthouse in downtown Winsor was not air-conditioned, so an already stressful situation was magnified by the heat.

Singular