Question: when was the last time crater lake volcano erupted
[{'answer': 'about 4,800 years ago', 'provenance': [{'wikipedia_id': '465235', 'title': 'Mount Mazama', 'start_paragraph_id': 65, 'start_character': 23, 'end_paragraph_id': 65, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Eruptive history.:Recent activity and potential hazards.\n'}]}, {'provenance': [{'wikipedia_id': '465235', 'title': 'Mount Mazama', 'start_paragraph_id': 65, 'start_character': 0, 'end_paragraph_id': 65, 'end_character': 2466, 'bleu_score': 0.9608966329519011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2130888794394707165}, 'section': 'Section::::Eruptive history.:Recent activity and potential hazards.\n'}]}]