wolffd@0: digraph G {
wolffd@0: 	subgraph cluster_small {
wolffd@0: 		a -> b;
wolffd@0: 		label=small;
wolffd@0: 	}
wolffd@0: 
wolffd@0: 	subgraph cluster_big {
wolffd@0: 		p -> q -> r -> s -> t;
wolffd@0: 		label=big;
wolffd@0: 		t -> p;
wolffd@0: 	}
wolffd@0: 
wolffd@0: 	t -> a;
wolffd@0: 	b -> q;
wolffd@0: }