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: Inside the box was a pencil -- a yellow, wooden pencil, with a graphite lead.

SOLUTION: Singular

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

SOLUTION: Singular

PROBLEM: There was so much passion in the single word that she found it hard to swallow.

SOLUTION:
Singular