Question: who invented a method for recording sound on flat discs
[{'answer': 'Emile Berliner', 'provenance': [{'wikipedia_id': '4556078', 'title': 'History of sound recording', 'start_paragraph_id': 28, 'start_character': 424, 'end_paragraph_id': 28, 'end_character': 438, 'bleu_score': 1.0, 'section': 'Section::::Acoustical recording.:Phonautograph.\n'}]}, {'provenance': [{'wikipedia_id': '4556078', 'title': 'History of sound recording', 'start_paragraph_id': 34, 'start_character': 0, 'end_paragraph_id': 34, 'end_character': 914, 'bleu_score': 0.9871375943883031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13867117925645867784}, 'section': 'Section::::Acoustical recording.:Phonograph/Gramophone.\n'}]}]