Question: when was the last time mount shasta blew
[{'answer': '1786', 'provenance': [{'wikipedia_id': '76241', 'title': 'Mount Shasta', 'start_paragraph_id': 10, 'start_character': 41, 'end_paragraph_id': 10, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]