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