grandparent:
  id: 1
  tree_id: 1
  name: Grand Parent

parent_a:
  id: 2
  tree_id: 1
  parent_id: 1
  name: Parent A

parent_b:
  id: 3
  tree_id: 1
  parent_id: 1
  name: Parent B

child_one_of_a:
  id: 4
  tree_id: 1
  parent_id: 2
  name: Child one

child_two_of_b:
  id: 5
  tree_id: 1
  parent_id: 2
  name: Child two