Question: who played the young tristan in legends of the fall
[{'answer': 'Keegan MacIntosh', 'provenance': [{'wikipedia_id': '654530', 'title': 'Legends of the Fall', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '654530', 'title': 'Legends of the Fall', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 52, 'bleu_score': 0.51697315395717, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5674227758889145306}, 'section': 'Section::::Cast.\n'}]}]