@Nonnull
@Override
public Set<OntologyAxiomPair> parse(String expression) {
ManchesterOWLSyntaxParser parser = new ManchesterOWLSyntaxParserImpl(
new OWLAPIConfigProvider(), dataFactory);
parser.setOWLEntityChecker(checker);
parser.setStringToParse(expression);
parser.setDefaultOntology(verifyNotNull(defaultOntology));
parser.setOWLOntologyChecker(verifyNotNull(ontologyChecker));
return parser.parseFrames();