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]: " Those aliens attacked us, and earth was destroyed because of what they did.
[A]: Plural


[Q]: Things were about to get difficult.
[A]: Plural


[Q]: Questions upon questions kept popping into her head.
[A]:
Plural