 <code>data.frame</code> will have 40 rows. Some variables,
such as dates, contain unexpectedly several entries for some documents.
You should always check the number of unique identifiers in the results
instead of assuming that each row is a unique observation.</p>
<div class="section level4">
<h4 id="eurovoc-descriptors">EuroVoc descriptors<a class="anchor" aria-label="anchor" href="#eurovoc-descriptors"></a>
</h4>
<p>EuroVoc is a multilingual thesaurus, keywords from which are used to
describe the conten