text.mod/graphviz.mod/graphviz/tests/graphs/try.gv

digraph G {
	subgraph cluster_small {
		a -> b;
		label=small;
	}

	subgraph cluster_big {
		p -> q -> r -> s -> t;
		label=big;
		t -> p;
	}

	t -> a;
	b -> q;
}