Question: who won the 15th season of american idol
[{'answer': 'Trent Harmon', 'provenance': [{'wikipedia_id': '46680404', 'title': 'American Idol (season 15)', 'start_paragraph_id': 1, 'start_character': 410, 'end_paragraph_id': 1, 'end_character': 422, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46680404', 'title': 'American Idol (season 15)', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 605, 'bleu_score': 0.902040471564542, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1915608159915598674}, 'section': 'Section::::Abstract.'}]}]