title: Parse XML with BS4
body: <p>How would I go about getting the value under the tag declination units? I'm looking to return the '-6.43798' using BeautifulSoup4 in python.</p>
  
  <pre><code>&lt;html&gt;&lt;body&gt;&lt;maggridresult&gt;
  &lt;version&gt;
  0.5.0.7
  &lt;/version&gt;
  &lt;result&gt;
  &lt;date&gt;
  2017.07671
  &lt;/date&gt;
  &lt;latitude units="degree"&gt;
  42.26042
  &lt;/latitude&gt;
  &lt;longitude units="degree"&gt;
  -84.46044
  &lt;/longitude&gt;
  &lt;elevation units="km"&gt;
  0.00000
  &lt;/elevation&gt;
  &lt;declination units="degree"&gt;
  -6.43798
  &lt;/declination&gt;
  &lt;declination_sv units="degree"&gt;
  -0.03752
  &lt;/declination_sv&gt;
  &lt;declination_uncertainty units="degree"&gt;
  0.37303
  &lt;/declination_uncertainty&gt;
  &lt;/result&gt;
  &lt;/maggridresult&gt;
  &lt;/body&gt;&lt;/html&gt;
  </code></pre>
  
  <p>I think it has to do with the find or find all function but I'm not sure how in specific to implement it.</p>
  
  <p>Thanks!</p>