query: SELECT ?item ?value WHERE
  {
    ?item p:P243/ps:P243 ?value .
    
    FILTER( REGEX(REPLACE(STR(?value), "%20", " "), "^((((https?://(www\\.)?worldcat\\.org/)?identities/)?lccn\\-)?(n|nb|nr|no|ns|sh)([4-9][0-9]|00|20[0-1][0-9])\\-?([0-9]{4})/?)$") )
  }