Example with all variables modifiable

rougail:                      # Rougail
  leadership_1:               # A leadership
    - leader: value1          # A leader
      follower: example       # A follower
    - leader: value2          # A leader
      follower: example       # A follower
  leadership_2:               # A second leadership
    - leader:                 # A leader
      follower: val           # A follower
    - leader:                 # A leader
      follower: val           # A follower