span><span class="p">)</span><span class="o">.</span><span class="n">post_goal</span><span class="p">()</span>                 <span class="c1"># lib(lists)</span>
<span class="n">A_var</span><span class="o">=</span><span class="n">Var</span><span class="p">()</span>                                         <span class="c1"># Create variable A</span>
<span class="n">Compound</span><span class="p">(</span><span class="s2">&quot;member&quot;</span><span class="p">,</span><span class="n">A_var</span><span class