title: How to lemmatize a list of sentences
body: <p>How can I lemmatize a list of sentences in Python?</p>
  
  <pre><code>from nltk.stem.wordnet import WordNetLemmatizer
  a = ['i like cars', 'cats are the best']
  lmtzr = WordNetLemmatizer()
  lemmatized = [lmtzr.lemmatize(word) for word in a]
  print(lemmatized)
  </code></pre>
  
  <p>This is what I've tried but it gives me the same sentences. Do I need to tokenize the words before to work properly?</p>