Question: who invented the first curling iron in 1872
[{'answer': 'Marcel Grateau', 'provenance': [{'wikipedia_id': '36859454', 'title': 'Marcelling', 'start_paragraph_id': 4, 'start_character': 52, 'end_paragraph_id': 4, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]