def nltkdemo18plus():
    return nltkdemo18() + [
        Template(Word([-1]), Pos([1])),
        Template(Pos([-1]), Word([1])),
        Template(Word([-1]), Word([0]), Pos([1])),
        Template(Pos([-1]), Word([0]), Word([1])),
        Template(Pos([-1]), Word([0]), Pos([1])),
    ]
Return 18 templates, from the original nltk demo, and additionally a few
dataset/ETHPy150Open nltk/nltk/nltk/tag/brill.py/nltkdemo18plus