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my $parser = XML::Rules->new(
  rules => {
...
    print "It's a blog post\n\n"; 
  }
  ...

my $parser = XML::Rules->new(
  rules => {
...
    print "It's a blog post with labels: ".join(', ', @{$entry->{categ
+ory}})."\n\n"; 
  }
  ...