Question: when did the wsop move to the rio
[{'answer': '2005', 'provenance': [{'wikipedia_id': '33116', 'title': 'World Series of Poker', 'start_paragraph_id': 6, 'start_character': 231, 'end_paragraph_id': 6, 'end_character': 235, 'bleu_score': 1.0, 'section': "Section::::History.:Acquisition by Harrah's.\n"}]}, {'provenance': [{'wikipedia_id': '33116', 'title': 'World Series of Poker', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 681, 'bleu_score': 0.9542174745769371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6726762818913669888}, 'section': "Section::::History.:Acquisition by Harrah's.\n"}]}]