PPT Slide

owned( bessy , Person ) : -

bought( bessy , Person , manufacturer ) .

owned( bessy , Person ) : -

bought( bessy , Person , Seller ) ,

owned( bessy , Seller ) .

bought( bessy , fred , manufacturer ) .

bought( bessy , ben , carl ) .

bought( bessy , carl , fred ) .

|? - owned( bessy , Who ) .

B E S S Y

P.20

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