Question: who wrote the songs for fiddler on the roof
[{'answer': 'Jerry Bock', 'provenance': [{'wikipedia_id': '89444', 'title': 'Fiddler on the Roof', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Sheldon Harnick', 'provenance': [{'wikipedia_id': '89444', 'title': 'Fiddler on the Roof', 'start_paragraph_id': 1, 'start_character': 69, 'end_paragraph_id': 1, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]