Question: what is the biggest casino in the united states
[{'answer': 'WinStar World Casino and Resort', 'provenance': [{'wikipedia_id': '30275412', 'title': 'WinStar World Casino', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30275412', 'title': 'WinStar World Casino', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 961, 'bleu_score': 0.688298524763693, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6000763067677729329}, 'section': 'Section::::Abstract.'}]}]