Question: when was the last time mount etna exploded
[{'answer': '16 March 2017', 'provenance': [{'wikipedia_id': '169351', 'title': 'Mount Etna', 'start_paragraph_id': 38, 'start_character': 15, 'end_paragraph_id': 38, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::History of volcanic eruptions.:Eruptions.:Recent eruptions.\n'}]}, {'answer': 'July -- October 2012'}, {'provenance': [{'wikipedia_id': '169351', 'title': 'Mount Etna', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 1054, 'bleu_score': 0.8843506446261651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 105760475313262329}, 'section': 'Section::::History of volcanic eruptions.:Eruptions.:Historical eruptions.\n'}]}, {'provenance': [{'wikipedia_id': '169351', 'title': 'Mount Etna', 'section': 'Section::::History of volcanic eruptions.:Eruptions.:Recent eruptions.\n', 'start_paragraph_id': 38, 'end_paragraph_id': 38, 'meta': {'evidence_span': ['An eruption on 16 March 2017 injured 10 people, including a BBC News television crew, after magma exploded upon contact with snow.\rhighlight sentence(s) containing evidence, not only the answer', '16 March 2017', 'An eruption on 16 March 2017 injured 10 people']}}]}]