code: def rate_sentence(self, sentence, significant_stems):
      ratings = self._get_chunk_ratings(sentence, significant_stems)
      return max(ratings) if ratings else 0
  
file_path: sumy/sumy/summarizers/luhn.py
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  from ..models import TfDocumentModel
  from ._summarizer import AbstractSummarizer
label_desc: Use image node_id 5 for calling the LuhnSummarizer obj's underlying member method code with example usage: obj.rate_sentence(sentence, significant_stems) and returns: unknown