The Legal-Entity in a Sale that agrees to exchange a Product for a Sale Price.
(<=> (Vendor ?X) (Or (Exists (?Sale) (Sale-Vendor ?Sale ?X)) (Exists (?For-Sale) (For-Sale-Vendor ?For-Sale ?X))))
(Inherited-Facet-Value Slot-Cardinality Sale Sale-Vendor 1) (Inherited-Facet-Value Minimum-Slot-Cardinality Sale Sale-Vendor 0)