(collect-all-extensions-of rdfs:comment)<br/>((#&lt;rdfsClass rdfs:Class&gt; "The 
class of classes.")<br/>&nbsp;(#&lt;rdfs:Class rdfs:Resource&gt; "The class 
resource, everything.")<br/>&nbsp;(#&lt;rdfs:Class rdf:Property&gt; "The class of 
RDF properties.")<br/>&nbsp;(#&lt;rdfs:Class rdf:Statement&gt; "The class of RDF 
statements.")<br/>&nbsp;(#&lt;rdfs:Class rdfs:Datatype&gt; "The class of RDF 
datatypes.")<br/>&nbsp;(#&lt;rdfs:Class rdf:List&gt; "The class of RDF 
Lists.")<br/>&nbsp;(#&lt;rdfs:Class r