Which sentence goes on the adverb and the other in adjectives?

The new library opens in a month.

We will find many books about horses there.

Adverb:?

Adjective:?

Since adjectives tell us how much or how many of something you're talking about, "many" which comes before the noun "books" is the adjective. On the other hand, adverbs answer the question: How, When, Where, To what extent, or magnitude, so the word "there" answers the "where" question. It modifies the adjectives and verb.