select multiple entities for datatable

[hispeedsurfer]

Have used several attempts to display data from multiple entities without success

List reslist = entityManager.createQuery("select qr.gpnum, csy.name from QueryResult qr, Csy20oats csy where qr.gpnum=csy.y20gpnum").getResultList();
 return reslist;

<rich:dataTable id="entitylist" var="results" value="#{gmBean.resultList}">
 <h:column>
 <f:facet name="header">name</f:facet>
 #{results.name}
 </h:column>
 <h:column>
 <f:facet name="header">gpnum</f:facet>
 #{results.gpnum}
 </h:column>

 </rich:dataTable>

display data from only one entity - no problem

List reslist = entityManager.createQuery("select qr from QueryResult qr, Csy20oats csy where qr.gpnum=csy.y20gpnum").getResultList();
 return reslist;

Also have used ListDataModel, but it's the same.

Is it possible to display data from multiple entities and if 'yes', what I have to do?