del_country(N,C,Cap,CapP,A,Pop) :- ext_del_country(N,C,Cap,CapP,A,Pop),
    country(N,C,Cap,CapP,A,Pop), not blk_del_country(N,C,Cap,CapP,A,Pop).
del_province(P,C,PPop,PA,PCap,PCapProv) :- pot_del_country(N,C,Cap,CapP,A,Pop),
    del_country(N,C,Cap,CapP,A,Pop), province(P,C,PPop,PA,PCap,PCapProv).
del_city(CN,C,P,CPop,Lat,Long,El) :- pot_del_country(N,C,Cap,CapP,A,Pop),
    del_country(N,C,Cap,CapP,A,Pop), city(CN,C,P,CPop,Lat,Long,El).
del_isMember(C,O,T) :- pot_del_country(N,C,Cap,CapP,A,P),
    del_country(N,C,Cap,CapP,A,P), isMember(C,O,T).
del_organization(O,N,Ci,Co,P,E) :- ext_del_organization(O,N,Ci,Co,P,E),
    organization(O,N,Ci,Co,P,E), not blk_del_organization(O,N,Ci,Co,P,E).
del_isMember(C,O,T) :- del_organization(O,N,Ci,Co,P,E), isMember(C,O,T).