Question: who plays caleb in seven brides for seven brothers
[{'answer': 'Matt Mattox', 'provenance': [{'wikipedia_id': '60174', 'title': 'Seven Brides for Seven Brothers', 'start_paragraph_id': 26, 'start_character': 65, 'end_paragraph_id': 26, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Brothers.\n'}]}, {'provenance': [{'wikipedia_id': '60174', 'title': 'Seven Brides for Seven Brothers', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 58, 'bleu_score': 0.53107253497887, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5904312754164118861}, 'section': 'Section::::Cast.\n'}]}]