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 mate and children are dead.

SOLUTION: Singular

PROBLEM: Light footsteps on the stairs woke me, what felt like seconds later.

SOLUTION: Plural

PROBLEM: Her latest release, Jumping Ship, is a dedication to her country of birth and an introductory novella to the Island Hopping Series.

SOLUTION:
Singular