</span>
<span>                      fcol <span class="op">=</span> <span class="st">"dadcol"</span>,</span>
<span>                      mcol <span class="op">=</span> <span class="st">"momcol"</span>,</span>
<span>                      icol <span class="op">=</span> <span class="st">"id"</span><span class="op">)</span></span>
<span><span class="va">graph</span></span></code></pre></div>
<pre><code><span><span class="co">## IGRAPH c8357cf DN-- 31 44 -- </span></span>
<span><span class="co">## + attr: name (v