query: SELECT DISTINCT ?item ?rkdurl  WHERE {
    wd:P350 wdt:P1630 ?formatterurl .
    ?item wdt:P195 wd:Q1499958 .
    ?item wdt:P31 wd:Q3305213 .   
     OPTIONAL { ?item wdt:P350 ?rkdid }.
    BIND(REPLACE(?rkdid, '^(\\d+)$', CONCAT("[", ?formatterurl, " $1]")) AS ?rkdurl)  .  
    } 
   LIMIT 4000