/c), lower (v/n), upper (v/n), sex (v/c)</span></span>
<span><span class="co">## + edges from c8357cf (vertex names):</span></span>
<span><span class="co">##  [1] dad     -&gt;pid        mom     -&gt;pid        dad     -&gt;sib       </span></span>
<span><span class="co">##  [4] mom     -&gt;sib        dad2    -&gt;mhs        mom     -&gt;mhs       </span></span>
<span><span class="co">##  [7] dad     -&gt;phs        mom2    -&gt;phs        mgf     -&gt;mom       </span></span>
<span><span class="co">## [10