Question: when did mt. rainier last have a significant eruption
[{'answer': 'between 1820 and 1854', 'provenance': [{'wikipedia_id': '21251533', 'title': 'Mount Rainier', 'start_paragraph_id': 24, 'start_character': 47, 'end_paragraph_id': 24, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Geology.:Modern activity and the current threat.\n'}]}, {'provenance': [{'wikipedia_id': '21251533', 'title': 'Mount Rainier', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 162, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10432875079877595998}, 'section': 'Section::::Geology.:Modern activity and the current threat.\n'}]}]