Question: who were the leaders of the battle of chickamauga
[{'answer': 'William Rosecrans', 'provenance': [{'wikipedia_id': '204642', 'title': 'Battle of Chickamauga', 'start_paragraph_id': 2, 'start_character': 73, 'end_paragraph_id': 2, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Braxton Bragg', 'provenance': [{'wikipedia_id': '204642', 'title': 'Battle of Chickamauga', 'start_paragraph_id': 2, 'start_character': 140, 'end_paragraph_id': 2, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]