Question: richest country in the world in terms of gdp
[{'answer': 'China', 'provenance': [{'wikipedia_id': '485118', 'title': 'List of countries by GDP (PPP)', 'start_paragraph_id': 22, 'start_character': 12, 'end_paragraph_id': 22, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Notes.\n'}]}]