VERIFY not exists ( 
	SELECT assegnatoScol.c2
     	FROM sparqltable (
		SELECT ?c1 ?c2 
      		WHERE { 
            		?c1 rdf:type 'BambinoNonScol'. 
			?c1 :assegnatoScol ?c2. 
			?c2 rdf:type 'ClasseDiScol'. 
      		}
	) assegnatoScol
	GROUP BY (assegnatoScol.c2) 
	HAVING COUNT(*) < 5 
)