--- a/presentations/iswc-2012/rdfa/blog-example.html	Tue Nov 06 13:15:26 2012 -0500
+++ b/presentations/iswc-2012/rdfa/blog-example.html	Tue Nov 06 13:26:19 2012 -0500
@@ -12,6 +12,7 @@
 
 <div prefix="foaf: http://xmlns.com/foaf/0.1/
              sioc: http://rdfs.org/sioc/ns#
+             sio:  http://semanticscience.org/resource/
              prov: http://www.w3.org/ns/prov#">
   
   <p>The Guardian's Data Blog has an
@@ -33,7 +34,7 @@
      Here's a graph from the post:<br>
   
     <span about="http://www.guardian.co.uk/news/datablog/2012/nov/02/happiness-index-how-much-trust-government#highcharts-0"
-          typeof="prov:Entity">
+          typeof="prov:Entity sio:SIO_000445">
       <span property="prov:wasAttributedTo" resource="#yougov"/>
       <img rel="prov:hadDerivation" src="graph.png" typeof="prov:Entity"/>
     </span>.