Answer:
We voted on the numerous antique cars.
Step-by-step explanation:
An adverb phrase is a group of two or more words that have neither a subject nor a verb, and whose function is to act as an adverb, that is to say, to modify or to add more detail to an adjective, a verb or another adverb.
In the sentence, "on the numerous antique cars" is a phrase because it is a group of words without a subject or a verb, and it functions as an adverb because it modifies and adds further detail to the verb "voted."