TASK DEFINITION: In this task you are given a sentence. You must judge whether the object of the main clause is singular(like: apple) or plural(like: apartments). Label the instances as "Singular" or "Plural" based on your judgment.
PROBLEM: People learnt new skills and put them into practice.

SOLUTION: Plural

PROBLEM: General Saunders, who was the jet's pilot, and Joe Bishop, the West Coast Head of the National Security Agency, exited the aircraft.

SOLUTION: Singular

PROBLEM: Besides, I have allies. "

SOLUTION:
Plural