code: def nltkdemo18plus():
      """
      Return 18 templates, from the original nltk demo, and additionally a few
      multi-feature ones (the motivation is easy comparison with nltkdemo18)
      """
      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])),
      ]
  
imports: from collections import Counter, defaultdict
  from nltk import jsontags
  from nltk.tag import TaggerI
  from nltk.tbl import Feature, Template
label_desc: Use image node_id 2 for calling a global function with example usage: nltkdemo18plus() and returns: unknown