Question: where will the 2020 summer olympics be held
[{'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.'}]}]