Thank @Ekaterina_Dranitsyna . Now, I can see the structure and I haven’t the same issue.
In the next steps, It shows other issue 
Epoch 1/15
---------------------------------------------------------------------------
InvalidArgumentError                      Traceback (most recent call last)
<ipython-input-148-dc3ca411f24b> in <module>()
     40 
     41             model_m1.fit([train_s1_seq,train_s2_seq, train_dist],y_train.values.reshape(-1,1), epochs = num_epochs,
---> 42                                 batch_size=val_batch,validation_data=([val_s1_seq, val_s2_seq, test_dist],y_val.values.reshape(-1,1)))
     43 
     44             print("Train:")

6 frames
/usr/local/lib/python3.7/dist-packages/tensorflow/python/eager/execute.py in quick_execute(op_name, num_outputs, inputs, attrs, ctx, name)
     58     ctx.ensure_initialized()
     59     tensors = pywrap_tfe.TFE_Py_Execute(ctx._handle, device_name, op_name,
---> 60                                         inputs, attrs, num_outputs)
     61   except core._NotOkStatusException as e:
     62     if name is not None:

InvalidArgumentError:  indices[1,2] = 62 is not in [0, 3)
	 [[node model_28/text_dist/embedding_lookup (defined at <ipython-input-148-dc3ca411f24b>:42) ]] [Op:__inference_train_function_57239]

Errors may have originated from an input operation.
Input Source operations connected to node model_28/text_dist/embedding_lookup:
 model_28/text_dist/embedding_lookup/54789 (defined at /usr/lib/python3.7/contextlib.py:112)

Function call stack:
train_function

¿Any idea what’s up?
My structure is:

  
      

      postimg.cc
  

  
    

figure 2 — Postimages 25



  

  
    
    
  

  


Greetings
CarlosJ