How to ignore unused XML elements while deserializing a document?

I'm using SimpleXml to (de)serialize POJOs. Now, I have a big XML which has some elements which are not needed. For instance, with this XML:

<Root>
   <Element>Used</Element>
   <Another>Not used</Another>
<Root> 

I want to create a POJO which looks like:

@Root
class Root{
    @Element
    private String element;
}

Problem is that I'm getting this Exception:

simpleframework.xml.core.ElementException: Element 'Another' does not have a
match in class blah.blah.Blah at line 1

So... how should I configure the POJO so that I can parse the XML correctly?