Question: what country and city hosted the 2008 summer olympics
[{'answer': 'Beijing , China', 'provenance': [{'wikipedia_id': '77745', 'title': '2008 Summer Olympics', 'start_paragraph_id': 1, 'start_character': 199, 'end_paragraph_id': 1, 'end_character': 214, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]