Question: who played swifty in the movie six pack
[{'answer': 'Robby Still', 'provenance': [{'wikipedia_id': '2400444', 'title': 'Six Pack (film)', 'start_paragraph_id': 15, 'start_character': 12, 'end_paragraph_id': 15, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '2400444', 'title': 'Six Pack (film)', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 33, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16370005142926030722}, 'section': 'Section::::Cast.\n'}]}]