Question: who was the leader of the confederate army
[{'answer': 'Confederate president , Jefferson Davis', 'provenance': [{'wikipedia_id': '293722', 'title': 'Confederate States Army', 'start_paragraph_id': 1, 'start_character': 411, 'end_paragraph_id': 1, 'end_character': 450, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '293722', 'title': 'Confederate States Army', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1080, 'bleu_score': 0.697798540794591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 508137371205193969}, 'section': 'Section::::Abstract.'}]}]