Question: which country will host the summer olympics in 2020
[{'answer': 'Tokyo', 'provenance': [{'wikipedia_id': '1610886', 'title': '2020 Summer Olympics', 'start_paragraph_id': 1, 'start_character': 72, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1610886', 'title': '2020 Summer Olympics', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 192, 'bleu_score': 0.52648469222475, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6012814855352839768}, 'section': 'Section::::Abstract.'}]}]