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]: His footsteps echoed like a death knell when he walked away.
[A]: Plural


[Q]: " Hey, " the rogue called, walking up to me.
[A]: Singular


[Q]: The white unicorn drove his entire weight, sidelong, into Cerberus's obsidian side, knocking the dark unicorn's body into the rubble.
[A]:
Singular