TASK DEFINITION: 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.
PROBLEM: Still, there was a certain subtlety of expression that Earth models lacked'.

SOLUTION: Singular

PROBLEM: The chef has been preparing it all evening and it's quite extraordinary.

SOLUTION: Singular

PROBLEM: The lizards, it seemed, had learned the futility of assaulting wild furies and were quick to avoid those the trio had brought with them.

SOLUTION:
Plural