Question: who sings chained to the rhythm with katy perry
[{'answer': 'Skip Marley', 'provenance': [{'wikipedia_id': '53111607', 'title': 'Chained to the Rhythm', 'start_paragraph_id': 1, 'start_character': 175, 'end_paragraph_id': 1, 'end_character': 186, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53111607', 'title': 'Chained to the Rhythm', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 470, 'bleu_score': 0.908895122164409, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4308839245564694209}, 'section': 'Section::::Abstract.'}]}]