playbook_all.yml

---
- hosts: all
  become: true

  tasks:
    - name: Run a cool shell command on all hosts
      ansible.builtin.shell: echo "my name is {{ inventory_hostname }} in the {{ group_names }} group(s)."
      register: response

    - name: Output a variable from the previous task
      debug:
        var: response.stdout

- import_playbook: playbook_atlanta.yml