pan style="color: #BCBCBC;">8</span> Bill    guitarists Rolling Stones</span></span>
<span><span class="co">#&gt; <span style="color: #BCBCBC;">9</span> Charlie drummers   Rolling Stones</span></span>
<span><span class="va">bands_membs_agg_map</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/aggregation_map_helpers.html">agg_table_to_agg_map</a></span><span class="op">(</span><span class="va">df</span>, few_colname <span class="op">=</span> <span class="st">"band"</span>, many_col