          graph TB
          subgraph One
            a1-->a2-->a3
          end

          graph TB
            a_a --> b_b:::apa --> c_c:::apa
            classDef apa fill:#f9f,stroke:#333,stroke-width:4px;
            class a_a apa;

          graph TB
            a_a(Aftonbladet) --> b_b[gorilla]:::apa --> c_c{chimp}:::apa -->a_a
            a_a --> c --> d_d --> c_c
            classDef apa fill:#f9f,stroke:#333,stroke-width:4px;
            class a_a apa;
            click a_a "http://www.aftonbladet.se" "apa"