Question: who played harmonica on the wizard black sabbath
[{'answer': 'Ozzy Osbourne', 'provenance': [{'wikipedia_id': '1981210', 'title': 'The Wizard (Black Sabbath song)', 'start_paragraph_id': 11, 'start_character': 146, 'end_paragraph_id': 11, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Covers.\n'}]}]