Question: when was the first time mount tambora erupted
[{'answer': '3910 BC ± 200 years', 'provenance': [{'wikipedia_id': '152994', 'title': 'Mount Tambora', 'start_paragraph_id': 15, 'start_character': 219, 'end_paragraph_id': 15, 'end_character': 234, 'bleu_score': 0.668740304976422, 'section': 'Section::::Geological history.:Eruptive history.\n'}]}, {'provenance': [{'wikipedia_id': '152994', 'title': 'Mount Tambora', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 503, 'bleu_score': 0.9766041382465441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4826705331440170778}, 'section': 'Section::::Geological history.:Eruptive history.\n'}]}]