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

With a flounce of her skirts, the maid disappeared.
Singular

The Alliance satellites functioned very well, however, and boosted the weak signal we were able to produce.

Plural