Question: where did the nuclear power plant explode in japan
[{'answer': 'Ōkuma , Fukushima', 'provenance': [{'wikipedia_id': '31162817', 'title': 'Fukushima Daiichi nuclear disaster', 'start_paragraph_id': 1, 'start_character': 75, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]