Question: who does belgium play in round of 16
[{'answer': 'Japan', 'provenance': [{'wikipedia_id': '54569024', 'title': '2018 FIFA World Cup knockout stage', 'start_paragraph_id': 36, 'start_character': 22, 'end_paragraph_id': 36, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Round of 16.:Brazil vs Mexico.\n'}]}, {'provenance': [{'wikipedia_id': '54569024', 'title': '2018 FIFA World Cup knockout stage', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 390, 'bleu_score': 0.625301600424765, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2009616264989718176}, 'section': 'Section::::Round of 16.:Belgium vs Japan.\n'}]}]