Android, simple-xml, how to declare a list of elements?

I have this data structure:

<estates version="0.1">

 <provider name="Foo">
  <estate id="12345678">
   <description>aaa</description>
   <size>300</size>
  </estate>
  <estate id="12345679">
   <description>bbb</description>
   <size>450</size>
  </estate>
 </provider>

 <provider name="Bar">
  <estate id="987654321">
   <description>yyy</description>
   <size>100</size>
  </estate>
  <estate id="987654320">
   <description>zzz</description>
   <size>240</size>
  </estate>
 </provider>

</estates>

which I get from a web service of mine. I would like to instantiate Android "Estates", "Provider", and "Estate" classes, using simple-xml library.

Class Estates.java:

@Root
public class Estates {
   @ElementList
   private List<Estate> providers;

   @Attribute
   private String version;
}

Class Estate.java:

public class Estate { 
   @Attribute
   private String id;

   @Element(required=false)
   private String description;

   @Element(required=false)
   private Integers size;
}

I.e., I use an @ElementList (List<Estate> providers) for the providers, but this way I can only use one provider list (having two lists, as in my example, gives:

"ERROR/com.simplexml.XmlActivity(4266): Uncaught exception: org.simpleframework.xml.core.PersistenceException: Element 'providers' declared twice at line 1").

More, I can't get "name" attribute. In practice, I suppose I have to dismiss the "List<Estate> providers" approach, but how to replace it? Should I use a "Collection"?