Question: where are cancer treatment centers of america located
[{'answer': 'Zion , Illinois', 'provenance': [{'wikipedia_id': '7918322', 'title': 'Cancer Treatment Centers of America', 'start_paragraph_id': 4, 'start_character': 233, 'end_paragraph_id': 4, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'Tulsa , Oklahoma', 'provenance': [{'wikipedia_id': '7918322', 'title': 'Cancer Treatment Centers of America', 'start_paragraph_id': 5, 'start_character': 59, 'end_paragraph_id': 5, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'Philadelphia , Pennsylvania'}, {'answer': 'Goodyear , Arizona'}, {'answer': 'Newnan , Georgia'}]