Question: what type of lava did mt st helens have
[{'answer': 'dacite lava', 'provenance': [{'wikipedia_id': '36649', 'title': 'Mount St. Helens', 'start_paragraph_id': 3, 'start_character': 251, 'end_paragraph_id': 3, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36649', 'title': 'Mount St. Helens', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 437, 'bleu_score': 0.972782728923768, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10883236084522364208}, 'section': 'Section::::Abstract.'}]}]