docstr: Return the parse tree for the sentence.
docstr_tok: ["Return","the","parse","tree","for","the","sentence","."]
code: def parse(self, sentence):
      """Return the parse tree for the sentence."""
      if not self._trained:
          self.train()
      pos_tags = [pos for (word, pos) in sentence]
      tagged_pos_tags = self.tagger.tag(pos_tags)
      chunktags = [chunktag for (pos, chunktag) in tagged_pos_tags]
      conlltags = [
          (word, pos, chunktag)
          for ((word, pos), chunktag) in zip(sentence, chunktags)
      ]
      return nltk.chunk.util.conlltags2tree(conlltags)
  
imports: from __future__ import unicode_literals, absolute_import
  import nltk
  from textblob.taggers import PatternTagger
  from textblob.decorators import requires_nltk_corpus
  from textblob.utils import tree2str, filter_insignificant
  from textblob.base import BaseNPExtractor
label_desc: Use image node_id 3 for calling the ChunkParser obj's underlying member method code with example usage: obj.parse(sentence) and returns: nltk