Question: when is the last time fleetwood mac toured
[{'answer': '2017', 'provenance': [{'wikipedia_id': '11787', 'title': 'Fleetwood Mac', 'start_paragraph_id': 86, 'start_character': 224, 'end_paragraph_id': 86, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::History.:2014–present: Return of Christine McVie and later departure of Buckingham.\n'}]}, {'provenance': [{'wikipedia_id': '11787', 'title': 'Fleetwood Mac', 'start_paragraph_id': 86, 'start_character': 0, 'end_paragraph_id': 86, 'end_character': 613, 'bleu_score': 0.7867468318839, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6015231625435630857}, 'section': 'Section::::History.:2014–present: Return of Christine McVie and later departure of Buckingham.\n'}]}]