Question: nickname of chopin etude op 25 no 1
[{'answer': 'Aeolian Harp', 'provenance': [{'wikipedia_id': '9828047', 'title': 'Étude Op. 25, No. 1 (Chopin)', 'start_paragraph_id': 2, 'start_character': 145, 'end_paragraph_id': 2, 'end_character': 157, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'The Shepherd Boy', 'provenance': [{'wikipedia_id': '9828047', 'title': 'Étude Op. 25, No. 1 (Chopin)', 'start_paragraph_id': 2, 'start_character': 191, 'end_paragraph_id': 2, 'end_character': 207, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9828047', 'title': 'Étude Op. 25, No. 1 (Chopin)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 382, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2859697367849185085}, 'section': 'Section::::Abstract.'}]}]