get the load times for the all of the definition files

def load_times(self, **kwargs):
        """ get the load times for the all of the definition files"""
        log.setLevel(kwargs.get("log_level", self.log_level))
        conn = self.__get_conn__(**kwargs)
        try:
            result = conn.query("""
                    SELECT ?file ?time
                    {
                        graph kdr:load_times {?s ?p ?time} .
                        bind(REPLACE(str(?s),
                            "http://knowledgelinks.io/ns/data-resources/",
                            "")
                             as ?file)
                    }""", **kwargs)
            loaded = {item['file']['value']: XsdDatetime(item['time']['value'])
                      for item in result}
            self.loaded = list(loaded)
            self.loaded_times = loaded
            log.setLevel(self.log_level)
            return loaded
        except requests.exceptions.ConnectionError:
            log.warning("connection error with '%s'", conn)
            log.setLevel(self.log_level)
            self.loaded = []
            return {}