>,</span> <span class="n">3</span><span class="pn">)</span> <span class="pn">|]</span><span class="pn">,</span>  <span class="id">Node</span> <span onmouseout="hideTip(event, 'fs6', 8)" onmouseover="showTip(event, 'fs6', 8)" class="id">None</span><span class="pn">,</span> <span onmouseout="hideTip(event, 'fs7', 9)" onmouseover="showTip(event, 'fs7', 9)" class="id">Some</span> <span class="pn">[|</span> <span onmouseout="hideTip(event, 'fs1', 10)" onmouseover="showTip(event, 'fs1', 10)" class="id">chairLeftR