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```
#!perl
use strict;
...
  }
}
__DATA__
```

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<?xml version="1.0" encoding="ISO-8859-1"?>
<label_x data1="somevalue" data2="someothervalue" data3="anothervalue"
+>
...
        <label_b b="still_more_data">data_of_variable_number_of_lines_
+and_indentations</label_b>
    </label_a>
</label_x>