query: SELECT ?item ?value WHERE
  {
    ?item p:P973/ps:P973 ?value .
    
    FILTER( REGEX(REPLACE(STR(?value), "%20", " "), "^(https?://www\\.musee-orsay\\.fr/(fr|en)/collections/(catalogue-des-oeuvres|index-of-works)/notice.html\\?(?:no_cache=1&)?nnumid=0*(\\d+))$") )
  }