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.

Their shared orgasm left them spent and still connected, hugging each other while their breathing slowly returned to normal.
Singular

His footsteps echoed like a death knell when he walked away.
Plural

And all the hum drum functions of the day went on along with it in inexorable monotony.

Plural