query: SELECT  ?iso2 (?item AS ?wd_id) ?osm_id  ?itemLabel
  WHERE
  {
    ?item wdt:P297 ?iso2 .
    OPTIONAL{?item wdt:P402 ?osm_id .}
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  ORDER BY ?iso2
  