Question: when was the last time the erta ale volcano erupted
[{'answer': 'January 2017', 'provenance': [{'wikipedia_id': '12675083', 'title': 'Erta Ale', 'start_paragraph_id': 6, 'start_character': 355, 'end_paragraph_id': 6, 'end_character': 367, 'bleu_score': 1.0, 'section': 'Section::::Geology.\n'}]}, {'provenance': [{'wikipedia_id': '12675083', 'title': 'Erta Ale', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 367, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7861642914227225923}, 'section': 'Section::::Geology.\n'}]}]