class_docstr: A noun phrase extractor that uses chunk parsing trained with the
  ConLL-2000 training corpus.
class_docstr_tok: ["A","noun","phrase","extractor","that","uses","chunk","parsing","trained","with","the","ConLL-2000","training","corpus","."]
code: def __init__(self, parser=None):
      self.parser = ChunkParser() if not parser else parser
  
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 1 to create a new ConllExtractor object from inherited base classes: BaseNPExtractor with example: obj = ConllExtractor(parser)