Question: where is the piano found in an orchestra
[{'answer': 'A concerto', 'provenance': [{'wikipedia_id': '44116', 'title': 'Concerto', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44116', 'title': 'Concerto', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 528, 'bleu_score': 0.515662376012585, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9888435223636455801}, 'section': 'Section::::Abstract.'}]}]