Question: what is the difference between tuba and sousaphone
[{'answer': 'general shape and appearance', 'provenance': [{'wikipedia_id': '39752', 'title': 'Sousaphone', 'start_paragraph_id': 8, 'start_character': 460, 'end_paragraph_id': 8, 'end_character': 488, 'bleu_score': 1.0, 'section': 'Section::::Construction.\n'}]}, {'provenance': [{'wikipedia_id': '39752', 'title': 'Sousaphone', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 537, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1086612862439490951}, 'section': 'Section::::Construction.\n'}]}]