class_docstr: Abstract parser of input format into DOM.
code: def tokenize_sentences(self, paragraph):
      return [
          s
          for s in self._tokenizer.to_sentences(paragraph)
          if s.strip()
      ]
  
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
label_desc: Use image node_id 2 for calling the DocumentParser obj's underlying member method code with example usage: obj.tokenize_sentences(paragraph) and returns: unknown