/span><span class="p">,</span> <span class="n">idx</span><span class="p">):</span>
        <span class="n">chunk</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tokens</span><span class="p">[</span><span class="n">idx</span><span class="p">:</span><span class="n">idx</span><span class="o">+</span><span class="bp">self</span><span class="o">.</span><span class="n">window</span><span class="p">]</span>
        <span class="n">label</span> <span class="o">=</