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 fingernails scraped against granite.

SOLUTION: Plural

PROBLEM: " Unfortunately my functions are limited.

SOLUTION: Plural

PROBLEM: The guilt was eating away at her, but he hadn't spoken his intentions either.

SOLUTION:
Singular