> Input: Bison from Buffalo , which bison from Buffalo bully , themselves bully bison from Buffalo . Parse:

   Bison NNP ROOT
    +-- from IN prep
    |   +-- Buffalo NNP pobj
    +-- , , punct
    +-- bison NN ccomp
    |   +-- themselves PRP nsubj
    |   +-- bully RB advmod
    |   +-- from IN prep
    |       +-- Buffalo NNP pobj
    +-- . . punct