digraph G {

  e1[label="softmax\n<oneDNN>"]
  e2[label="layer_norm\n<Paddle CPU>"]
  
  c[label="b"]
  e[label="a"]
  subgraph cluster_0 {  
  label="in-placed"
  a -> e1
  e1 -> c
  }
  
  c -> e2
  e2 -> e
  
}