Question: who sings do it til you're satisfied
[{'answer': 'B.T. Express'}, {'provenance': [{'wikipedia_id': '14254684', 'title': "Do It ('Til You're Satisfied)", 'start_paragraph_id': 1, 'start_character': 8, 'end_paragraph_id': 1, 'end_character': 796, 'bleu_score': 0.7288966100906841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16111144378307758384}, 'section': 'Section::::Abstract.'}]}]