Question: who played del preston in wayne's world
[{'answer': 'Ralph William John Brown', 'provenance': [{'wikipedia_id': '2235411', 'title': 'Ralph Brown', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2235411', 'title': 'Ralph Brown', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 581, 'bleu_score': 0.833156963868471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6851894701885650060}, 'section': 'Section::::Abstract.'}]}]