Question: who won the the battle of bull run
[{'answer': 'Confederate forces', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 1, 'start_character': 123, 'end_paragraph_id': 1, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 1, 'start_character': 17, 'end_paragraph_id': 1, 'end_character': 679, 'bleu_score': 0.9071670544464081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13274581185066733367}, 'section': 'Section::::Abstract.'}]}]