@staticmethod
    def extract_property(tokens, index):
        return tokens[index][1]
returns a n,3 array of facets with the x,y,z coordinates of each vertex
dataset/ETHPy150Open nltk/nltk/nltk/tag/brill.py/Pos.extract_property--crossover with--dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/geometry/stl.py/STL.get_facets