Question: how many stadiums are in russia for world cup
[{'answer': 'twelve', 'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 75, 'start_character': 7, 'end_paragraph_id': 75, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Venues.\n'}]}, {'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 77, 'start_character': 0, 'end_paragraph_id': 77, 'end_character': 88, 'bleu_score': 0.7285505954775411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2053539589025496885}, 'section': 'Section::::Venues.:Stadiums.\n'}]}]