Question: who became the supreme in american horror story
[{'answer': 'Cordelia', 'provenance': [{'wikipedia_id': '38827962', 'title': 'American Horror Story: Coven', 'start_paragraph_id': 6, 'start_character': 29, 'end_paragraph_id': 6, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Cast and characters.:Main.\n'}]}]