Question: who was involved in the bull run battle
[{'answer': 'Winfield Scott', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 10, 'start_character': 104, 'end_paragraph_id': 10, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Background.:Military and political situation.\n'}]}, {'answer': 'Irvin McDowell', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 2, 'start_character': 255, 'end_paragraph_id': 2, 'end_character': 269, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Robert Patterson', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 18, 'start_character': 254, 'end_paragraph_id': 18, 'end_character': 270, 'bleu_score': 1.0, 'section': "Section::::Background.:McDowell's plan and initial movements in the Manassas Campaign.\n"}]}, {'answer': 'P.G.T. Beauregard', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 15, 'start_character': 440, 'end_paragraph_id': 15, 'end_character': 457, 'bleu_score': 1.0, 'section': 'Section::::Background.:Intelligence.\n'}]}, {'answer': 'Joseph E. Johnston', 'provenance': [{'wikipedia_id': '228867', 'title': 'First Battle of Bull Run', 'start_paragraph_id': 3, 'start_character': 44, 'end_paragraph_id': 3, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "Thomas `` Stonewall '' Jackson"}]