(Inheritance (Concept "B") (Concept "Parent"))
(Inheritance (Concept "C") (Concept "Parent"))
(define put-get-lambda
(PutLink
(LambdaLink
(VariableNode "x")
(EdgeLink
(PredicateNode "relation")
(ListLink
(VariableNode "x")
(ConceptNode "A"))))
(CollectionOf
(MeetLink
(Inheritance (Variable "$X") (Concept "Parent"))))))
(define expected-put-get-lambda
(SetLink
(EdgeLink
(PredicateNode "relation")
(ListLink
(ConceptNode "B")
(ConceptNode "A")))
(EdgeLink
(PredicateNode "relation")
(ListLink
(ConceptNode "C")
(ConceptNode "A")))))