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.

A young widow, Anne Marie had adopted the girl after volunteering at a local grade school.
Singular

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

The added bonus of the couple next to us getting engaged had been like icing on the cake.

Singular