text: Title: About RNN
  Body: I wrote a RNN program that i did't use nn.model so that I could see the structure. But I find some problem. Code and the datasets are as follow
  
  https://github.com/VeritasXu/RNN
  
  Can you run and see the structure? I think my program is correct, but the input type of add_graph function results in the strange structure. Could you help me ?