class_docstr: An implementation of TextRank algorithm for summarization.
  
  Source: https://web.eecs.umich.edu/~mihalcea/papers/mihalcea.emnlp04.pdf
class_docstr_tok: ["An","implementation","of","TextRank","algorithm","for","summarization",".","Source",":","https",":","\/\/web.eecs.umich.edu\/~mihalcea\/papers\/mihalcea.emnlp04.pdf"]
code: def _to_words_set(self, sentence):
      words = map(self.normalize_word, sentence.words)
      return [
          self.stem_word(w) for w in words if w not in self._stop_words
      ]
  
file_path: sumy/sumy/summarizers/text_rank.py
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import math
  from ._summarizer import AbstractSummarizer
label_desc: Use image node_id 7 for calling the TextRankSummarizer obj's underlying member method code with example usage: obj._to_words_set(sentence) and returns: unknown