T: does it eat people?
  T: does it eat bananas?
    T: Is it an ape?
      N:
      T: Is it a shark?
        N:
        N:
    T: Is it a lion?
      N:
      T: Is it a shark?
        N:
        N:
  T: does it eat bananas?
    T: Is it an ape?
      N:
      T: Is it an elephant?
        N:
        N:
    T: Is it a koala?
      N:
      T: Is it an elephant?
        N:
        N:
N:
N: