--- a/rdf-primer/index.html	Fri Nov 29 15:38:15 2013 +0000
+++ b/rdf-primer/index.html	Fri Nov 29 16:57:04 2013 +0000
@@ -292,7 +292,7 @@
     predicates form the arcs. </p> 
 
     <figure>
-      <img src="example-graph.jpg" width="75%"
+      <img src="example-graph.jpg" width="60%"
                 alt="Informal graphs of the sample triples">
       <figcaption>Informal graph of the sample triples</figcaption>
     </figure>
@@ -964,11 +964,25 @@
 
     <h2>RDF Data</h2>
 
-   <p>@@ RDF sources, linked data, SPARQL</p>
-   
-   <p class="issue">Do we need to include more examples, e.g. of the
-use of multiple graphs? </p>
+    <p>A large amount of RDF data is available as part of the Linked Data [[LINKED-DATA]] cloud.
+    Datasets are being published and interlinked on the Web using RDF, and many of them offer
+    a querying facility through SPARQL [[!SPARQL11-OVERVIEW]]. Examples of such datasets used
+    in the examples above include:</p>
 
+    <ul>
+      <li><a href="http://www.wikidata.org/">Wikidata</a>, a free, collaborative and multilingual database and ran by the
+      <a href="http://www.wikimedia.org/">Wikimedia Foundation</a></li>
+      <li><a href="http://dbpedia.org/">DBpedia</a>, publishing data extracted
+      from <a href="http://en.wikipedia.org/wiki/Help:Infobox">Wikipedia infoboxes</a>.
+      <li><a href="http://www.europeana.eu/">Europeana</a>, publishing data about cultural objects from
+      a large number of European institutions</li>
+      <li><a href="http://viaf.org/">VIAF</a>, publishing data about people, works and geographic places
+      from a number of national libraries and other agencies.</li>
+    </ul>
+
+    <p>A list of datasets available within the Linked Data cloud is maintained at
+    <a href="http://datahub.io/organization/lodcloud">datahub.io</a>.</p>
+    
 </section>
 
 <section id="section-other-syntaxes" class="appendix">