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: These ideas already existed at that time from Hinduism.

SOLUTION: Plural

PROBLEM: The blond captain backed up and took Anna's hand, and he pulled her down the corridor to the left.

SOLUTION: Singular

PROBLEM: " Get the last one, " said Marius as the first of the trucks passed the dune, chasing after the sedan.

SOLUTION:
Singular