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use strict;
use warnings;
...
exc_artists=a; list; of; artists; to; exclude
exc_songs=a; list; of; songs; to; exclude
exc_year=a; list; of; years; to; exclude

use strict;
use warnings;
...
exc_artists=a; list; of; artists ;to; exclude
exc_songs=a; list; of; songs;to; exclude  
exc_year=a; list; of  ; years; to; exclude

$VAR1 = {
          'inc_genres' => [
...
                            'exclude'
                          ]
        };