Question: who won the battle of gettysburg the north or the south
[{'answer': 'Union', 'provenance': [{'wikipedia_id': '4849', 'title': 'Battle of Gettysburg', 'start_paragraph_id': 1, 'start_character': 110, 'end_paragraph_id': 1, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]