You can create a couple of deployments with the following commands:
kubectl run echo1 --image=gcr.io/google_containers/echoserver:1.4 --replicas=2 --labels=app=echo,version=1.4 --port=8080
kubectl run echo2 --image=gcr.io/google_containers/echoserver:1.5 --replicas=2 --labels=app=echo,version=1.5 --port=8080
Now we have 4 pods running 2 from each deployment. Let's take a look at the labels associated with them.
$ kubectl get pods --show-labels