Question: who is the guitar player for fleetwood mac
[{'answer': 'Mike Campbell', 'provenance': [{'wikipedia_id': '11787', 'title': 'Fleetwood Mac', 'start_paragraph_id': 4, 'start_character': 853, 'end_paragraph_id': 4, 'end_character': 866, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]