ta.frame'</span><span class="op">:</span><span class="st">    </span><span class="dv">1</span> obs. of  <span class="dv">4</span> variables<span class="op">:</span></a>
<a class="sourceLine" id="cb2-6" data-line-number="6"><span class="st"> </span><span class="er">$</span><span class="st"> </span>tokens           <span class="op">:</span>List of <span class="dv">2</span></a>
<a class="sourceLine" id="cb2-7" data-line-number="7">  ..<span class="op">$</span><span class="st"> </span><span class="er">:</span><