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.

Q: A flat screen television fitted snugly into the upper left corner wall.

A: Singular
****
Q: The large mansions, which lined both sides of the street, bore stately and placid witness to their conversation.

A: Plural
****
Q: Their tongues volleyed while Liz kissed him back with a ferocity that rivaled his own heightened desire.

A:
Plural
****