Question: when is the next world cup being held
[{'answer': '2022', 'provenance': [{'wikipedia_id': '17742072', 'title': '2022 FIFA World Cup', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]