query: SELECT ?Property_ ?Property_Label ?Property_Description ?format_as_a_regular_expression  ?syntax_clarification 
  WHERE {
    
  	?Property_ p:P2302 ?constraint_statement .
  	?constraint_statement ps:P2302 wd:Q21502404 .
  	OPTIONAL {?constraint_statement pq:P1793 ?format_as_a_regular_expression .}
  	OPTIONAL {?constraint_statement pq:P2916 ?syntax_clarification .}
  
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  
  } 