======================== unified (from filesystem) ========================
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                                        'duration'  '547'
                                          'artist'  'Leonard Bernstein, New York Philharmonic Orchestra'
                                     'text_people'  'Beethoven, Ludwig Van'
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                                           'title'  'Symphony #7 in A major, Op.92 - 2nd Movement'
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                                      'lastfmtags'  "['classical', 'nodame cantabile']"
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                                     'tracknumber'  '2'
                                      'tracktotal'  '8'
                                            'date'  '1964'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '122.1'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
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