digraph
   {
   subgraph cluster01
   {
   n00[label="LSTM"];
   n01[label="it"];
   n02[label="ft"];
   n03[label="gt"];
   n04[label="ot"];
   n05[label="ct"];
   n06[label="ht"];
   }
   n00 -> n01[label="wi,xt"];
   n00 -> n02[label="wf,xt"];
   n00 -> n03[label="wg,xt"];
   n00 -> n04[label="wo,xt"];
   n01 -> n05[label="it"];
   n02 -> n05[label="ft"];
   n03 -> n05[label="gt"];
   n04 -> n06[label="ot"];
   n05 -> n06[label="ct"];
   n06 -> n01[label="ht"];
   n06 -> n02[label="ht"];
   n06 -> n03[label="ht"];
   n06 -> n04[label="ht"];
   }