Question: when was the last time mount ruapehu erupted
[{'answer': '25 September 2007', 'provenance': [{'wikipedia_id': '63567', 'title': 'Mount Ruapehu', 'start_paragraph_id': 20, 'start_character': 22, 'end_paragraph_id': 20, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Volcanic activity.:2007 eruption.\n'}]}, {'answer': 'At about 8 : 20 p.m. on 25 September 2007'}, {'provenance': [{'wikipedia_id': '63567', 'title': 'Mount Ruapehu', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 379, 'bleu_score': 0.8379379630814321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10662353907955737533}, 'section': 'Section::::Volcanic activity.:2007 eruption.\n'}]}, {'provenance': [{'wikipedia_id': '63567', 'title': 'Mount Ruapehu', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10662353907955737533}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '63567', 'title': 'Mount Ruapehu', 'section': 'Section::::Volcanic activity.:2007 eruption.\n', 'start_paragraph_id': 20, 'end_paragraph_id': 20, 'meta': {'evidence_span': ['At about 8:20\xa0p.m. on 25 September 2007, a hydrothermal eruption occurred without warning.', 'At about 8:20\xa0p.m. on 25 September 2007, a hydrothermal eruption occurred without warning. One man, a 22-year-old primary school teacher, had a leg crushed by a rock during the eruption and a rescue operation was mounted to rescue him from the Dome Shelter near the crater.', 'At about 8:20\xa0p.m. on 25 September 2007, a hydrothermal eruption occurred without warning. One man, a 22-year-old primary school teacher, had a leg crushed by a rock during the eruption and a rescue operation was mounted to rescue him from the Dome Shelter near the crate']}}]}]