Question: who plays rufus in bill and ted's excellent adventure
[{'answer': 'George Carlin', 'provenance': [{'wikipedia_id': '23808966', 'title': "Bill & Ted's Excellent Adventure", 'start_paragraph_id': 1, 'start_character': 192, 'end_paragraph_id': 1, 'end_character': 205, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23808966', 'title': "Bill & Ted's Excellent Adventure", 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 34, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9891458190487315814}, 'section': 'Section::::Cast.\n'}]}]