graph G {
e
subgraph clusterA {
a -- b;
subgraph clusterC {
C -- D;
}
}
subgraph clusterB {
d -- f
}
d -- D
e -- clusterB
clusterC -- clusterB
}
graph G {
e
subgraph clusterA {
a -- b;
subgraph clusterC {
C -- D;
}
}
subgraph clusterB {
d -- f
}
d -- D
e -- clusterB
clusterC -- clusterB
}