Is this sentence a comma splice run-on or fragment sentence- The girl in front of you who appeared to be 19 was attempting buy beer?

The sentence "The girl in front of you who appeared to be 19 was attempting buy beer?" is a fragment.

A comma splice occurs when two independent clauses are joined with only a comma. A run-on sentence occurs when two independent clauses are joined with no punctuation. A fragment is a group of words that is not a complete sentence.

The sentence above is a fragment because it is missing a subject. The subject of a sentence is the person, place, or thing that is being talked about. In the sentence above, the person who is attempting to buy beer is not mentioned.