Question: where is this year's world cup being held
[{'answer': 'Russia', 'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 1, 'start_character': 203, 'end_paragraph_id': 1, 'end_character': 209, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]