code: def _split_into_words(sentences):
      """Splits multiple sentences into words and flattens the result"""
      return list(itertools.chain(*[_.split(" ") for _ in sentences]))
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import itertools
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: _split_into_words(sentences) and returns: list