Question: what is considered the turning point of the civil war
[{'answer': 'Battle of Gettysburg', 'provenance': [{'wikipedia_id': '1431266', 'title': 'Turning point of the American Civil War', 'start_paragraph_id': 1, 'start_character': 276, 'end_paragraph_id': 1, 'end_character': 296, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1431266', 'title': 'Turning point of the American Civil War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 689, 'bleu_score': 0.9822204502117851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3323628856866422263}, 'section': 'Section::::Abstract.'}]}]