 class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;CANNOT align the </span><span class="si">{</span><span class="n">token</span><span class="si">}</span><span class="s2"> to </span><span class="si">{</span><span class="n">sent</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>

            <span class="k">if</span> <span class="ow">not</span> <span class="n">tokens</span><span class="p">:</span>