Question: who sings on i ain't mad at cha
[{'answer': 'Danny Boy', 'provenance': [{'wikipedia_id': '6955261', 'title': "I Ain't Mad at Cha", 'start_paragraph_id': 1, 'start_character': 175, 'end_paragraph_id': 1, 'end_character': 184, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]