code: def words(self, fileids=None):
      return LazyConcatenation(self.posts(fileids))
  
file_path: nltk/nltk/corpus/reader/nps_chat.py
imports: import re
  import textwrap
  from nltk.corpus.reader.api import *
  from nltk.corpus.reader.util import *
  from nltk.corpus.reader.xmldocs import *
  from nltk.internals import ElementWrapper
  from nltk.tag import map_tag
  from nltk.util import LazyConcatenation
label_desc: Use image node_id 5 for calling the NPSChatCorpusReader obj's underlying member method code with example usage: obj.words(fileids) and returns: LazyConcatenation