Question: when was the last time mount saint helens erupted
[{'answer': '2004', 'provenance': [{'wikipedia_id': '36649', 'title': 'Mount St. Helens', 'start_paragraph_id': 12, 'start_character': 270, 'end_paragraph_id': 12, 'end_character': 274, 'bleu_score': 1.0, 'section': 'Section::::Geographic setting and description.:Crater Glacier and other new rock glaciers.\n'}]}, {'provenance': [{'wikipedia_id': '36649', 'title': 'Mount St. Helens', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 1032, 'bleu_score': 0.988538208695211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3359790112661275952}, 'section': 'Section::::Geographic setting and description.:Crater Glacier and other new rock glaciers.\n'}]}]