lass='fu'><a href='https://rdrr.io/pkg/keras/man/dataset_imdb.html'>dataset_imdb_word_index</a></span><span class='op'>(</span><span class='op'>)</span>
<span class='va'>word_index</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span>
  <span class='st'>"&lt;PAD&gt;"</span>, <span class='st'>"&lt;START&gt;"</span>, <span class='st'>"&lt;UNK&gt;"</span>, <span class='st'>"&lt;UNUSED&gt;"</span>,
  <span class='fu'><a href='https://