Suppose we want to translate the English sentence (source sentence) I am good to the French sentence (target sentence) Je vais bien. To perform this translation, we feed the source sentence I am good to the encoder. The encoder learns the representation of the source sentence. In the previous section, we learned how exactly the encoder learns the representation of the source sentence. Now, we take this encoder's representation and feed it to the decoder. The decoder takes the encoder representation as input and generates the target sentence Je vais bien, as shown in the following figure:
In the encoder section, we learned that, instead of having one encoder, we can have a stack of 
encoders. Similar to the encoder, we can also have a stack of 
decoders. For simplicity, let's set 
. As shown in the following figure, the output of one decoder is sent as the input to the decoder...