1. Walking a dog
  1.1 get dog ready
    1.1.1 call dog
    1.1.2 get leash
    1.1.3 put leash on dog
  1.2 get yourself ready
    1.2.1 put on pants
    1.2.2 put on shoes
    1.2.3 put on shirt
  1.3 take dog outside

  1.4 walk dog
  1.5 bring dog back inside