(tlp "2.0"
  (nodes 0 1 2 3)
  (edge 0 1 0)
  (edge 1 0 2)
  (edge 8 1 3)
  (cluster 3 "cluster"
    (nodes 1 2 3 )
    (edges 2 8 )
    (cluster 4 "Sub Cluster"
      (nodes 1 2 )
      (edges 2 )
    )
  )
)


