Question: who played first game in world cup 2018
[{'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.'}]}, {'answer': 'Saudi Arabia', 'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 13, 'start_character': 677, 'end_paragraph_id': 13, 'end_character': 689, 'bleu_score': 1.0, 'section': 'Section::::Teams.:Qualification.\n'}]}, {'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 136, 'start_character': 0, 'end_paragraph_id': 136, 'end_character': 441, 'bleu_score': 0.9143313961023831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 854166883507683590}, 'section': 'Section::::Schedule.\n'}]}]