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 Author holds exclusive rights to this work.

SOLUTION: Singular

PROBLEM: " Your new teacher, the principal, and Mrs. Groves, from the Superintendent's office.

SOLUTION: Singular

PROBLEM: There was a little amber mixed with the brown that he had once said looked like gold.

SOLUTION:
Singular