one:
    anchor: 1
    non_numeric_id: 'abcdefgh'
    parent_id: ~

two:
    anchor: 2
    parent_id: 'one'

three_with_a_very_long_name:
    anchor: 3
    created_on: '2007-01-01 10:20:30'
    updated_at: '2007-01-01 11:22:33'

four:
    id: 4
    parent_id: 'one'
    anchor: 0