Question: what are the names of the three pedals on a piano
[{'answer': 'soft pedal', 'provenance': [{'wikipedia_id': '8306275', 'title': 'Piano pedals', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'sostenuto pedal ,', 'provenance': [{'wikipedia_id': '8306275', 'title': 'Piano pedals', 'start_paragraph_id': 1, 'start_character': 209, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'sustaining pedal', 'provenance': [{'wikipedia_id': '8306275', 'title': 'Piano pedals', 'start_paragraph_id': 1, 'start_character': 234, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8306275', 'title': 'Piano pedals', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 408, 'bleu_score': 0.937535115907385, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13443509774380929314}, 'section': 'Section::::Abstract.'}]}]