query: SELECT ?item ?value WHERE
  {
    ?item p:P1214/ps:P1214 ?value .
    
    FILTER( REGEX(REPLACE(STR(?value), "%20", " "), "^(([\\da-f]{8&#125;-[\\da-f]{4&#125;-[\\da-f]{4&#125;-[\\da-f]{4&#125;-[\\da-f]{12}))$") )
  }