code: def segment_string(self, article):
      return nltk.tokenize.sent_tokenize(article)
  
file_path: gluon-nlp/scripts/processing/segment_sentences.py
imports: import statistics
  import nltk
  import multiprocessing
  from collections import defaultdict
  from itertools import islice
  import time
  import os
label_desc: Use image node_id 2 for calling the NLTKSegmenter obj's underlying member method code with example usage: obj.segment_string(article) and returns: nltk