i) What’s that over there?
ii) People can take their pets there.
iii) I believe one of the boys there thinks I'm pretty.
(All three are from COCA)
iv) Let’s go and see the pets there.
Does there function as an adjective in [iii]?
Over there in [i] seems to modify pronoun that; there in [ii] verb take. But in [iii], it is not that simple. Because I don’t find in dictionaries the word there is denoted as adjective, I hesitate to say there modifies the previous noun phrase. However it seems to functions like an adjective. In this case, do you say there functions as an adjective as a noun or adverb, or there is an omission, that is, is it the short form of ‘one of the boys who is there’?
Could there be read both adjective and adverb in [iv]?
When I add there in [iv], can it be interpreted ambiguous; that is, can there be read either an noun-modifier or adverbial adjunct?