title: DBPedia sub-categories
body: <p>I am trying to collect all sub-categories of a given category on DBPedia, but I'm not sure what is wrong with the following query:</p>
  
  <pre><code>PREFIX category: &lt;http://dbpedia.org/resource/Category:&gt;
  PREFIX skos: &lt;http://www.w3.org/2004/02/skos/core/&gt;
  select distinct ?subcategory where {
    category:American_pop_rock_singers skos:broader ?subcategory
  }
  </code></pre>
  
  <p>I thought that the <code>skos:broader</code> property was what I needed to use.</p>