A noun plays six major functions in any sentence.
The noun that is underlined is performing the function of appositive in the given sentence.
A noun functions as an object of the preposition when it helps in the completion of the preposition.
A noun functions as an indirect object if the noun is used after the action verb.
A noun performs the function of a subject when the sentence is written about it.
A noun performs that function of direct object if it is used after the action verb.
A noun performs the function of appositive if it is used preceding a noun or pronoun used in the sentence. Also, the usage of the phrase is equivalent to the noun already used.
A noun performs the function of predicate nominate when it is used after the linking verb.
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