@Override
 public Set<OntologyAxiomPair> parse(String expression) throws ParserException {
   ManchesterOWLSyntaxEditorParser parser =
       new ManchesterOWLSyntaxEditorParser(dataFactory, expression);
   parser.setOWLEntityChecker(checker);
   return parser.parseClassFrameEOF();
 }
 @Override
 public OWLClassExpression parse(String expression) {
   ManchesterOWLSyntaxEditorParser parser =
       new ManchesterOWLSyntaxEditorParser(dataFactory, expression);
   parser.setOWLEntityChecker(checker);
   return parser.parseClassExpression();
 }