@Test
public void testModificationsOnReadWirteYard() throws YardException{
RdfRepresentation rep = RdfValueFactory.getInstance().createRepresentation(
"http://www.test.org/addedEntity");
rep.addReference(RDF.type.getUnicodeString(), SKOS.Concept.getUnicodeString());
rep.addNaturalText(SKOS.prefLabel.getUnicodeString(), "added Entity", "en");
rep.addNaturalText(SKOS.prefLabel.getUnicodeString(), "hinzugefüte Entity", "de");
readwriteYard.store(rep);
//test that the data where added and modified in the read/wirte grpah