code: def sentences_split(line):
      nltk.data.path.append(os.environ.get("PWD"))
      sent_tokenizer = nltk.tokenize.PunktSentenceTokenizer()
      sentenized = sent_tokenizer.tokenize(line)
      return sentenized
  
file_path: BigDL/python/dllib/src/bigdl/dllib/feature/dataset/sentence.py
imports: import nltk
  import os
  import itertools
  import sys
  from nltk.tokenize import word_tokenize
label_desc: Use image node_id 2 for calling a global function with example usage: sentences_split(line) and returns: sentenized