OWLClass petOwner = OWL.Class( NS + "pet+owner" );
// Explain why mad cow is an unsatisfiable concept
Set<Set<OWLAxiom>> exp = expGen.getUnsatisfiableExplanations( madCow );
out.println( "Why is " + madCow + " concept unsatisfiable?" );
renderer.render( exp );
// Now explain why animal lover is a sub class of pet owner
exp = expGen.getSubClassExplanations( animalLover, petOwner );
out.println( "Why is " + animalLover + " subclass of " + petOwner + "?" );
renderer.render( exp );