Question: who were the two leaders of the rough riders
[{'answer': 'Leonard Wood', 'provenance': [{'wikipedia_id': '145971', 'title': 'Rough Riders', 'start_paragraph_id': 5, 'start_character': 1214, 'end_paragraph_id': 5, 'end_character': 1226, 'bleu_score': 1.0, 'section': 'Section::::Formation and Early History.\n'}]}, {'answer': 'Theodore Roosevelt', 'provenance': [{'wikipedia_id': '145971', 'title': 'Rough Riders', 'start_paragraph_id': 2, 'start_character': 69, 'end_paragraph_id': 2, 'end_character': 87, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]