Read the following sentences and find out the object nouns in them.
You can call the manager later.

Hint:

Subjects' nouns are always the actors in sentences. If action is implied, you should use subject nouns. They are I, you, he, she, we, they, and who.
Object pronouns are those pronouns that receive the action in a sentence. They are me, you, him, her, us, them, and whom.An object pronoun can also be used after prepositions