function test_delete()
 {
     $users_ids = get_users(array('fields' => 'id'));
     foreach ($users_ids as $user_id) {
         // Get the URI.
         $user_uri = Wordlift_User_Service::get_instance()->get_uri($user_id);
         $query = Wordlift_Query_Builder::new_instance()->delete()->statement($user_uri, Wordlift_Query_Builder::RDFS_TYPE_URI, '?o')->build() . Wordlift_Query_Builder::new_instance()->delete()->statement($user_uri, Wordlift_Query_Builder::RDFS_LABEL_URI, '?o')->build() . Wordlift_Query_Builder::new_instance()->delete()->statement($user_uri, Wordlift_Query_Builder::SCHEMA_GIVEN_NAME_URI, '?o')->build() . Wordlift_Query_Builder::new_instance()->delete()->statement($user_uri, Wordlift_Query_Builder::SCHEMA_FAMILY_NAME_URI, '?o')->build();
         $this->log_service->info($query);
     }
 }