digraph G {
  subgraph cluster_team_leaders {
	  style = filled; /* defines the cluster */
	  color = lightgrey;
	  label = "Team leaders";
	  
	  Guido [shape = plaintext]; /* defines the elements in the cluster */
	  Iznogood [shape = plaintext];
	  Floris [shape = plaintext];
	  Guus [shape = plaintext];
	  Unknown [shape = plaintext, label = "?"];
  }
  
  subgraph cluster_authors {
	  style = filled;
	  color = blue;
	  label = "Authors";
	  
	  JeanEtienne [shape = plaintext, label = "Jean-Etienne"];
	  John [shape = plaintext];
	  Gunter [shape = plaintext, label = "GĂźnter"];
	  Laurent [shape = plaintext];
  }
  
  EditorInChief [label = "Editor in chief"];
  FrenchTeam [label = "French Team"];
  DutchTeam [label = "Dutch Team"];
  ContactPersonForEnglish [label = "Contact Person for English"];
  GermanTeam [label = "German Team"];
  
  EditorInChief -> Guido;
  EditorInChief -> FrenchTeam;
  EditorInChief -> DutchTeam;
  EditorInChief -> ContactPersonForEnglish;
  EditorInChief -> GermanTeam;
  
  FrenchTeam -> Iznogood;
  DutchTeam -> Floris;
  DutchTeam -> Guus;
  ContactPersonForEnglish -> Guido;
  GermanTeam -> Unknown;
  
  Guido -> John;
  Unknown -> Gunter;
  Iznogood -> Laurent;
  Guido -> JeanEtienne;
  Iznogood -> JeanEtienne;
}