Add example numbering in dataset/resource section

dcat/index.html

@@ -2777,8 +2777,7 @@ <h3>Relationships between datasets and other resources</h3>
     A general method for relating a resource to another resource with a specified relationship is provided by using the qualified form <a href="http://www.w3.org/ns/dcat#Property:resource_qualifiedRelation">dcat:qualifiedRelation</a>.
     The following provides illustrations:
   </p>
-<div class="example">
-<pre class="nohighlight turtle" aria-busy="false" aria-live="polite">
+<pre id="ex-dataset-resource" class="example nohighlight turtle" aria-busy="false" aria-live="polite">
 ex:Test987
   a dcat:Dataset ;
   dcat:qualifiedRelation [
@@ -2797,7 +2796,6 @@ <h3>Relationships between datasets and other resources</h3>
   ] ;
 .
 </pre>
-</div>
 
 <p class="note">
   Note: The property <a href="http://www.w3.org/ns/dcat#qualifiedRelation">dcat:qualifiedRelation</a> and association-class <a href="http://www.w3.org/ns/dcat#Relationship">dcat:Relationship</a> follow the pattern established in W3C [[PROV-O]] and described in the section <a href="https://www.w3.org/TR/prov-o/#description-qualified-terms">Qualified Terms</a>.