<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
 xmlns:eg="http://example.org/">

 <rdf:Description rdf:about="http://example.org/a">
   <eg:prop rdf:annotation="http://example.org/triple1">
     <rdf:Description rdf:about="http://example.org/b">
       <eg:prop rdf:annotation="http://example.org/triple2" rdf:resource="http://example.org/c"/>
     </rdf:Description>
   </eg:prop>
 </rdf:Description>
</rdf:RDF>