class_docstr: Reader for Europarl corpora that consist of plaintext documents.
  Documents are divided into chapters instead of paragraphs as
  for regular plaintext documents. Chapters are separated using blank
  lines. Everything is inherited from ``PlaintextCorpusReader`` except
  that:
  
  - Since the corpus is pre-processed and pre-tokenized, the
    word tokenizer should just split the line at whitespaces.
  - For the same reason, the sentence tokenizer should just
    split the paragraph at line breaks.
  - There is a new 'chapters()' method that returns chapters instead
    instead of paragraphs.
  - The 'paras()' method inherited from PlaintextCorpusReader is
    made non-functional to remove any confusion between chapters
    and paragraphs for Europarl.
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docstr: :return: the given file(s) as a list of
      chapters, each encoded as a list of sentences, which are
      in turn encoded as lists of word strings.
  :rtype: list(list(list(str)))
docstr_tok: [":","return",":","the","given","file","(","s",")","as","a","list","of","chapters",",","each","encoded","as","a","list","of","sentences",",","which","are","in","turn","encoded","as","lists","of","word","strings",".",":","rtype",":","list","(","list","(","list","(","str",")",")",")"]
code: def chapters(self, fileids=None):
      """
      :return: the given file(s) as a list of
          chapters, each encoded as a list of sentences, which are
          in turn encoded as lists of word strings.
      :rtype: list(list(list(str)))
      """
      return concat(
          [
              self.CorpusView(
                  fileid, self._read_para_block, encoding=enc
              )
              for (fileid, enc) in self.abspaths(fileids, True)
          ]
      )
  
imports: import nltk.data
  from nltk.corpus.reader.api import *
  from nltk.corpus.reader.util import *
  from nltk.tokenize import *
label_desc: Use image node_id 4 for calling the EuroparlCorpusReader obj's underlying member method code with example usage: obj.chapters(fileids) and returns: concat