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: There were streams and fields and even mountains beyond all of that.

SOLUTION: Plural

PROBLEM: The caller hung up.

SOLUTION: Singular

PROBLEM: Shuffling footsteps stopped my train of thought.

SOLUTION:
Plural