runs a sparql update query and returns the results

            args:
                sparql: the sparql query to run
                namespace: the namespace to run the sparql query against

def update_query(self, sparql, namespace=None, **kwargs):
        """ runs a sparql update query and returns the results

            args:
                sparql: the sparql query to run
                namespace: the namespace to run the sparql query against
        """
        return self.query(sparql, "update", namespace, **kwargs)