Example with all variables modifiable

---
leadership_1:                 # A leadership
  - leader: value1            # A leader
    follower: example         # A follower
  - leader: value2            # A leader
    follower: example1        # A follower
leadership_2:                 # A second leadership
  - leader: value1            # A leader
    follower:                 # A follower
      - value1
      - value2
  - leader: value2            # A leader
    follower:                 # A follower
      - value1
      - value2