def evalF0(f1, z, phi):
    return evalF1(f1, 0.5*(z + 1./z), phi)
Demonstration code for evaluating a chunk parser, using a
dataset/ETHPy150Open ggventurini/python-deltasigma/deltasigma/_evalF0.py/evalF0--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/chunk/regexp.py/demo_eval