Question: who is the number one artist in the world on spotify
[{'answer': 'Drake', 'provenance': [{'wikipedia_id': '55470454', 'title': 'List of most-streamed artists on Spotify', 'start_paragraph_id': 6, 'start_character': 43, 'end_paragraph_id': 6, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Yearly.:2018.\n'}]}]