A binary relation R HAS-VALUE-OF-TYPE T on domain instance d if there exists a v such that R(d,v) and v is an instance of T.
(Nth-Domain Has-Value-Of-Type 3 Class)
(Nth-Domain Has-Value-Of-Type 2 Binary-Relation)
(<=> (Has-Value-Of-Type ?Instance ?Binary-Relation ?Type)
(And (Binary-Relation ?Binary-Relation)
(Class ?Type)
(>= (Value-Cardinality ?Instance ?Binary-Relation) 1)
(Value-Type ?Instance ?Binary-Relation ?Type)))