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<span> Author_name </span> __filler__ ... <span> New_Author </span> __filler__ <ul>.....
my %publications = $tree->look_down( _tag => 'span'); ... next unless ($_ =~ /(?:span|li)/; $_ =~ /span/ ? $author =~ /\>(.+)\<\/span/ : push @publications{$aut +hor}, /li\>(.+)\<\/li/; }