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: But pirates were not a diplomatic breed.

SOLUTION: Plural

PROBLEM: The tip centered over my heart.

SOLUTION:
Singular