public static void superclasses(String expression){
	OWLCLassToRender currentClass = null;
	try {
	    currentClass = Brain.getClassToRender(expression);
	} catch (ParserException e1) {
	    error(404, "'" + expression + "' is not a valid OWL class expression");
	}
	List<OWLCLassToRender> superClasses = null;
	try {
	    superClasses = Brain.getSuperClassesToRender(expression, false);
	} catch (ParserException e) {
	    error(404, "'" + expression + "' is not a valid OWL class expression");
	}
	render(expression, currentClass, superClasses);
    }