Question: what was the vei of mt. st. helens
[{'answer': '5', 'provenance': [{'wikipedia_id': '673671', 'title': '1980 eruption of Mount St. Helens', 'start_paragraph_id': 1, 'start_character': 164, 'end_paragraph_id': 1, 'end_character': 165, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]