Question: where did the last olympic games take place
[{'answer': 'Rio de Janeiro', 'provenance': [{'wikipedia_id': '11015817', 'title': 'List of Olympic Games host cities', 'start_paragraph_id': 5, 'start_character': 300, 'end_paragraph_id': 5, 'end_character': 314, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]