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: My teacher shifted uncomfortably.

SOLUTION: Singular

PROBLEM: " Fifty packets, " Kowalski called from the bed.

SOLUTION: Plural

PROBLEM: Then instincts and training kicked in.

SOLUTION:
Plural