Question: what was the city of chicago known for at the turn of the 20th century
[{'answer': 'its rate of murders', 'provenance': [{'wikipedia_id': '1103866', 'title': 'History of Chicago', 'start_paragraph_id': 51, 'start_character': 40, 'end_paragraph_id': 51, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::20th century.:Politics in the late 19th and early 20th centuries.\n'}]}, {'provenance': [{'wikipedia_id': '1103866', 'title': 'History of Chicago', 'start_paragraph_id': 51, 'start_character': 0, 'end_paragraph_id': 51, 'end_character': 473, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3994440070631237530}, 'section': 'Section::::20th century.:Politics in the late 19th and early 20th centuries.\n'}]}]