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 off-duty homicide investigator put her napkin on the table, not realizing the impact of her words on the latecomers.
Singular

Her first inclination, as always in such circumstances, was to dig in her heels.
Singular

There's not even a scar.

Singular