digraph G {
subgraph cluster_first {
a -> b;
label=first;
}
subgraph cluster_second {
p -> q -> r -> s
label=second;
s -> p;
}
r -> a [ style=bold ];
b -> q;
}
digraph G {
subgraph cluster_first {
a -> b;
label=first;
}
subgraph cluster_second {
p -> q -> r -> s
label=second;
s -> p;
}
r -> a [ style=bold ];
b -> q;
}