Question

is the group of words in bold a phrase or a clause?
frankfurters, which are also known as wieners or hot dogs, originated in frankfurt,
germany, and are traditionally made from pork and beef.
phrase clause
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Explanation:

A clause contains a subject and a predicate (a verb or verb phrase), while a phrase does not. The bolded group "which are also known as wieners or hot dogs" has a subject ("which") and a predicate ("are also known as wieners or hot dogs"), so it is a clause.

Answer:

clause