query: #title: Check postal codes in Italy
  # Complex constraint from [[Property talk:P281]]
  #
  SELECT DISTINCT ?item ?zipCode WHERE { ?item wdt:P17 wd:Q38; wdt:P281 ?zipCode. FILTER( REGEX( STR( ?zipCode ), "^(\\d{5})(–\\d{5})?$" ) = false ) . } ORDER BY ?item