Question: when was the last time a volcano erupted in costa rica
[{'answer': 'April 2017', 'provenance': [{'wikipedia_id': '3498714', 'title': 'Turrialba Volcano', 'start_paragraph_id': 1, 'start_character': 153, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3498714', 'title': 'Turrialba Volcano', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 379, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16240750046565719450}, 'section': 'Section::::Abstract.'}]}]