2</span></a>
<a class="sourceLine" id="cb2-4" data-line-number="4">  ..<span class="op">$</span><span class="st"> </span><span class="er">:</span><span class="st">'data.frame'</span><span class="op">:</span><span class="st">    </span><span class="dv">7</span> obs. of  <span class="dv">4</span> variables<span class="op">:</span></a>
<a class="sourceLine" id="cb2-5" data-line-number="5"><span class="st">  </span>..<span class="op">$</span><span class="st"> </span><span class="er">:</span><span class="st">'da