I have a huge xml file, and some fields texts are in reality large chunks of xml, written in block of converted codes like the following: 

```
&lt;RESPONSE_DATA&gt;
    &lt;RESULT&gt;
        &lt;BLOCK&gt;
 ....
        &lt;/BLOCK&gt;
    &lt;/RESULT&gt;
&lt;/RESPONSE_DATA&gt;

```

I was wondering if there is some ready available tools or libraries to convert that into proper xml. Anything would do really, java/c# or other code, or any standalone tool.

thank you