training sample write this up here as X 0 and this here is X 1 and now we need to find this a this attention mask and that is an SGD again remember inferring anything through the energy function is a gradient descent process so ultimately our one training example consists of X 0 a at the beginning so let's call that a zero it consists of the SGD procedure to find W it consists of X 1 and they consist of the SGD procedure to find a the a 1 the output a and then that will give us the output a the a 1 so this here is our input in the classical