[ family => { name => 'Kawasaki' },
  [
    father => 'Yasushisa' ,
    mother => { hair => 'short'} => 'Chizuko' ,
    children =>
    [
      girl => 'Shiori',
      boy  => { hair => 'black' } => 'Yasuke',
      boy  => 'Kairi'
    ]
  ]
]