T: does it eat shoots and leaves?
  T: Is it a panda?
    N:
    N:
  T: does it eat porridge?
    T: does it eat people?
      T: Is it a bear?
        N:
        N:
      T: Is it a pig?
        N:
        N:
    T: Is it a cat?
      N:
      N:
N:
N: