Answer:
The answer to your question would be that fascinating functions as an objective complement.
Explanation:
An object complement, also called objective complement, follows a direct object. It may be a word or phrase that gives further meaning to the direct object. What is more, an object complement can be a noun, a pronoun or an adjective. In the sentence above, the adjective fascinating is the adjective giving further meaning to the D.O, which is old family records.
