Question: where is smoking most common in the world
[{'answer': 'China', 'provenance': [{'wikipedia_id': '18713424', 'title': 'List of countries by cigarette consumption per capita', 'start_paragraph_id': 4, 'start_character': 126, 'end_paragraph_id': 4, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]