lass="sourceCode R"><span class="va">forecast_emae</span> <span class="op">%&gt;%</span> 
  <span class="fu"><a href="https://dplyr.tidyverse.org/reference/select.html">select</a></span><span class="op">(</span><span class="va">sector</span>, <span class="va">nested_forecast</span><span class="op">)</span> <span class="op">%&gt;%</span> 
  <span class="fu"><a href="https://tidyr.tidyverse.org/reference/nest.html">unnest</a></span><span class="op">(</span><span class="va">nested_forecast</span><span class="o