Here is the sentence from The Britannica Dictionary: They stood under the tree and looked at the branches above.
The word 'above' in the sentence is an adverb according to the dictionary, and it seems to modify the noun 'branches'. So I'm confused with the rule I know, which is adverb doesn't modify noun. My question is: Does 'above' really modify 'branches'? Can adverbs modify nouns? Thank you!