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: This huge upright mass did not, however, rise directly from the sea.

A: Singular
****
Q: His attempts to remain secluded failed with every head turned in his direction.

A: Plural
****
Q: The thud of her heart seemed to reverberate in her chest.

A:
Singular
****