Question: El Retiro is a historic site in Lake Wales, Florida, that since 1970 has been part of a national historic landmark that consists of how many acres of garden?
{'answer': '250', 'supporting_facts': [['El Retiro (Lake Wales, Florida)', 0], ['El Retiro (Lake Wales, Florida)', 2], ['Bok Tower Gardens', 0], ['Bok Tower Gardens', 1]]}