Question: which country tops the world in the production of saffron
[{'answer': 'Iran', 'provenance': [{'wikipedia_id': '13490464', 'title': 'Trade and use of saffron', 'start_paragraph_id': 3, 'start_character': 648, 'end_paragraph_id': 3, 'end_character': 652, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]