graph { "1" [cluster="3", label="Node 1", pos="26.163,130.97"]; "2" [cluster="3", label="Node 2", pos="270.82,243.14"]; "3" [cluster="2", label="Node 3", pos="271.43,16.263"]; "4" [cluster="2", label="Node 4", pos="670.15,16.263"]; "5" [cluster="2", label="Node 5", pos="415.11,16.263"]; "6" [cluster="1", label="Node 6", pos="513.44,131.26"]; "1" -- "2"; "2" -- "3"; "1" -- "3"; "4" -- "5"; "4" -- "3"; "3" -- "5"; "6" -- "2"; "6" -- "1"; "6" -- "5"; }