Question: who is the best rapper of the year
[{'answer': 'Chance the Rapper', 'provenance': [{'wikipedia_id': '199298', 'title': 'Grammy Award for Best Rap Album', 'start_paragraph_id': 3, 'start_character': 815, 'end_paragraph_id': 3, 'end_character': 832, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]