digraph G {
    // Global configuration
    labelloc=c;

    // Actors
    "Expressif" [shape="octagon"];
    "Electro Cirkel" [shape="septagon"];
    "Kalex Holland" [shape="hexagon"];
    "LSC Light" [shape="pentagon"];
    "Action" [shape="house"];

    // Relations
    "Expressif" -> "Electro Cirkel" [xlabel="microcontroller vendor for  "];
    "Electro Cirkel" -> "Kalex Holland" [xlabel="importer of  "];
    "Kalex Holland" -> "LSC Light" [xlabel="supplier of  "];    
    "LSC Light" -> "Action" [xlabel="house label of  "];
}