query: SELECT ?i ?iLabel ?yLabel ?r WHERE {
  ?i wdt:P31 wd:Q101352 ;
  wdt:P282 wd:Q82772;
  wdt:P1705 ?yLabel.
  OPTIONAL{?i p:P1705 [pq:P2125 ?ro].}
  FILTER(BOUND(?ro))
  SERVICE wikibase:label { bd:serviceParam wikibase:language "ja". }
  }
  