Question: who wrote is you is or is you ain't my baby lyrics
[{'answer': 'Jordan', 'provenance': [{'wikipedia_id': '11233740', 'title': "Is You Is or Is You Ain't My Baby", 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Billy Austin'}]