title: Sparql insert query failing
body: <p>I am trying to run the below sparql query to insert data to my graph, but it's failing with the error: Error 400: Bad Request.</p>
  <pre><code>PREFIX rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt;
  PREFIX person: &lt;http://example.com/data/person#&gt;
  PREFIX contact: &lt;http://example.com/data/contact#&gt;
  
  INSERT
  { 
    person:p4595 contact:email &quot;test1@example.com&quot; ;
                 contact:mobile &quot;99483-43843&quot; .
      
    person:p6593 contact:email &quot;test2@example.com&quot; ;
                 contact:mobile &quot;55351-56477&quot; .
  }
  </code></pre>
  <p>I have validated all the IRIs and triples are correct. Not sure why the query is failing.</p>
  <p>Any help would be much appreciated. Thanks.</p>