Question: british singer who collaborated with kanye west on american boy
[{'answer': 'Estelle', 'provenance': [{'wikipedia_id': '15718837', 'title': 'American Boy', 'start_paragraph_id': 1, 'start_character': 63, 'end_paragraph_id': 1, 'end_character': 70, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15718837', 'title': 'American Boy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 711, 'bleu_score': 0.9832621206481431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11909689058345283413}, 'section': 'Section::::Abstract.'}]}]