Question: who sings that song nothing compares to you
[{'answer': 'Prince', 'provenance': [{'wikipedia_id': '2590551', 'title': 'Nothing Compares 2 U', 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2590551', 'title': 'Nothing Compares 2 U', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 554, 'bleu_score': 0.8191550051206761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16374135522973038288}, 'section': 'Section::::Abstract.'}]}]