Question: who won the gettysburg battle in the civil war
[{'answer': 'Union victory', 'provenance': [{'wikipedia_id': '4849', 'title': 'Battle of Gettysburg', 'start_paragraph_id': 98, 'start_character': 16, 'end_paragraph_id': 98, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Aftermath.:Union reaction to the news of the victory.\n'}]}]