>  $ age  : int  2 3 4 5 6 7 8 9 10 11 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ catch: int  2 8 29 33 55 61 45 49 50 46 ...</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="va">WhiteGrunt1</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   age catch</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1