code: def convert_softmax_output(node, **kwargs):
      
      name = node["name"]
  
      input1_idx = kwargs["index_lookup"][node["inputs"][0][0]]
      input1 = kwargs["proc_nodes"][input1_idx]
  
      softmax_node = onnx.helper.make_node(
          "Softmax",
          [input1.name],
          [name],
          axis=1,
          name=name
      )
  
      return [softmax_node]
docs: Map MXNet's SoftmaxOutput operator attributes to onnx's Softmax operator
      and return the created node.