strange behaviors of nltk `word_tokenize`</span>
            <span class="c1"># https://github.com/nltk/nltk/issues/1630</span>
            <span class="k">if</span> <span class="p">(</span><span class="n">word</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">&quot;``&quot;</span><span class="p">,</span> <span class="s2">&quot;&#39;&#39;&quot;</span><span class="p">))</span> <span class="ow">and</span> <span class="p">(</span><span class="n">sent</span><span class="p">[</span><span