Wrong label and sub-class definition in file examples/gx.rdf

The file examples/gx.rdf added via !313 (merged) contains the following information:

gx:LegalParticipant

a owl:Class;

rdfs:label "Dispatcher"@en ;

rdfs:subClassOf gax-core:ServiceOffering ;

.

In this file, the label and sub-class are not correct and should be changed to rdfs:label "Legal Participant"@en ; and rdfs:subClassOf gax-core:Participant;