rdrr.io/r/base/paste.html" class="external-link">paste</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/names.html" class="external-link">names</a></span><span class="op">(</span><span class="va">df</span><span class="op">)</span>, collapse <span class="op">=</span> <span class="st">" "</span><span class="op">)</span><span class="op">)</span></span>
<span>  <span class="co"># restrict to one response </span></span>
<span>  <span class="fu"><a href="https://rdrr.io/r/base/s