                       extract_var_list <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"rq_s1"</span>, <span class="st">"rq_s2"</span>, <span class="st">"rq_s3"</span>, <span class="st">"rq_s4"</span>,</span></span>
<span class="r-in"><span>                                               <span class="st">"rq_s5"</span>, <span class="st">"rq_s6"</span>, <span class="st">"rq_s7"</span>, <span class="