Question: who sings the chorus in all of the lights
[{'answer': 'Rihanna', 'provenance': [{'wikipedia_id': '30707158', 'title': 'All of the Lights', 'start_paragraph_id': 1, 'start_character': 350, 'end_paragraph_id': 1, 'end_character': 357, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]