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 metal tube slipped and he fell back and rolled into the Irishman's lap.

SOLUTION: Singular

PROBLEM: His suggested targets were dangerous people that had escaped punishment.

SOLUTION: Plural

PROBLEM: Is this the new design for the cave ? "

SOLUTION:
Singular