all:
  vars:
    nocweburl: https://www.example.com/screen/?hostname=$(hostname -s)
    ansible_user: pi
  children:
    prod:
      hosts:
        screen1:
          ansible_host: 203.0.113.47
        screen2:
          ansible_host: 203.0.113.49
        screen3:
          ansible_host: 203.0.113.49
    dev:
      hosts:
        screen0:
          ansible_host: 203.0.113.50   
          ansible_user: sysadmin