Question: who was the general of the union army at gettysburg
[{'answer': 'George G. Meade', 'provenance': [{'wikipedia_id': '4849', 'title': 'Battle of Gettysburg', 'start_paragraph_id': 117, 'start_character': 962, 'end_paragraph_id': 117, 'end_character': 977, 'bleu_score': 1.0, 'section': 'Section::::Historical assessment.:Lee vs. Meade.\n'}]}]