code: def preprocess(sentence):
      return [
          w for w in sentence.lower().split() if w not in stop_words
      ]
  
imports: import matplotlib.pyplot
  import matplotlib.image
  import logging
  from nltk.corpus import stopwords
  from nltk import download
  import gensim.downloader
label_desc: Use image node_id 1 for calling a global function with example usage: preprocess(sentence) and returns: unknown