Question: where was the second battle of bull run fought
[{'answer': 'Prince William County , Virginia', 'provenance': [{'wikipedia_id': '54492', 'title': 'Second Battle of Bull Run', 'start_paragraph_id': 90, 'start_character': 104, 'end_paragraph_id': 90, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Battlefield preservation.\n'}]}, {'provenance': [{'wikipedia_id': '54492', 'title': 'Second Battle of Bull Run', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 483, 'bleu_score': 0.9375874466695201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2839367104896834845}, 'section': 'Section::::Abstract.'}]}]