title: Group By not working in DBPedia
body: <p>I am working in <a href="http://dbpedia.org/snorql" rel="nofollow">DBPedia</a>. I am having a problem when using group by in Sparql.</p>
  
  <p>I have this code:</p>
  
  <pre><code>SELECT ?res ?titulo
          WHERE {
              ?res rdf:type &lt;http://dbpedia.org/class/yago/JaguaresDeChiapasFootballers&gt; .
              ?res rdfs:label ?titulo .
          }       
  GROUP BY (?res)
  LIMIT 15
  </code></pre>
  
  <p>I want to return a list of all in this type. But I only want to return one for each URI, I put the group by and it doesn’t work and I really don’t know why?</p>
  
  <p>Can someone help me?</p>