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: The human race needs things inventing constantly in order to evolve.

SOLUTION: Singular

PROBLEM: The concepts formed a vague semi circle around Fate, only Irony grumbled about it.

SOLUTION: Plural

PROBLEM: What more could a pilot ask for than an engineer or mechanic who took even possible malfunctions personally ?

SOLUTION:
Singular