Question: who created the sorcerer's stone in harry potter
[{'answer': 'Nicolas Flamel'}, {'provenance': [{'wikipedia_id': '48648', 'title': "Harry Potter and the Philosopher's Stone", 'start_paragraph_id': 12, 'start_character': 233, 'end_paragraph_id': 12, 'end_character': 892, 'bleu_score': 0.537311657211466, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14045727537483596828}, 'section': 'Section::::Synopsis.:Plot.\n'}]}]