Question: what is the theme park chain six flags named after
[{'answer': 'Six Flags Over Texas', 'provenance': [{'wikipedia_id': '249604', 'title': 'Six Flags', 'start_paragraph_id': 2, 'start_character': 95, 'end_paragraph_id': 2, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '249604', 'title': 'Six Flags', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 366, 'bleu_score': 0.769505840861164, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17674775548648354363}, 'section': 'Section::::Abstract.'}]}]