we'll get to other types of models later for now all models you would want to build are sequential we'll also want to add a dense layer so we import that in this application we classify photos into two categories or classes urban and rural we'll save that as num classes now we build the model we set up a sequential model that we can add layers to first we add all of a pre-trained ResNet 50 model we've written include top equals false this is how we specify that we want to exclude the layer that makes predictions