rly observation of concentration level of NOx in 355 days</p></dd>

  <dt>C6H6</dt>
<dd><p>Hourly observation of concentration level of C6H6 in 355 days</p></dd>

  <dt>temperature</dt>
<dd><p>Hourly observation of concentration
  level of temperature in 355 days</p></dd>

  <dt>humidity</dt>
<dd><p>Hourly observation of concentration
  level of humidity in 355 days</p></dd>


</dl></div>
    <div id="source">
    <h2>Source</h2>
    <p><a href="https://archive.ics.uci.edu/ml/datasets/Air+quality" class="ex