Question: who was the last republican mayor in chicago
[{'answer': 'William Hale Thompson', 'provenance': [{'wikipedia_id': '40302', 'title': 'William Hale Thompson', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40302', 'title': 'William Hale Thompson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 676, 'bleu_score': 0.82758960922473, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 261502018787735526}, 'section': 'Section::::Abstract.'}]}]