a</span>(<span class="st">&quot;paris2012&quot;</span>)</a>
<a class="sourceLine" id="cb19-2" data-line-number="2">paris2012 <span class="op">%&gt;%</span></a>
<a class="sourceLine" id="cb19-3" data-line-number="3"><span class="st">  </span><span class="kw">slice</span>(<span class="dv">1</span><span class="op">:</span><span class="dv">100</span>) <span class="op">%&gt;%</span></a>
<a class="sourceLine" id="cb19-4" data-line-number="4"><span class="st">  </span><span class="kw">mutate</span>(</a>
<a class="