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 blades sailed over each man's left shoulder and lodged in the wall behind them.
Plural

Those concepts that knew nothing of Fate's error had expected something more physically daunting than the duo that faced them.
Plural

Our electricity always works.

Singular