public static DefaultGraph createGraph(Concept concept){
DefaultGraph graph = new DefaultGraph();
ArrayList <Node> nodes = new ArrayList <Node> ();
ArrayList <Edge> edges = new ArrayList <Edge> ();
Node conceptNode = new ConceptNode(concept.getConceptDescription().getName());
Node superClassRoot = new PrintNode( ApplicationResources.getString("superclasses.node.root"));
Node subClassRoot = new PrintNode( ApplicationResources.getString("subclasses.node.root"));
Node relationsRoot = new PrintNode( ApplicationResources.getString("relations.node.root"));
Node instancesRoot = new PrintNode( ApplicationResources.getString("instances.node.root"));
Node instancesOfRoot = new PrintNode( ApplicationResources.getString("instancesOf.node.root"));