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why this error coming?

dili

Junior Member
I 'm new to Prolog.
I create prolog programme as below
Code:
apple( liz, tom):-parent( tom, liz).
when type question in the prolog as this
?- apple(tom,liz).
as the answer I got false.but I thought it should be true because by this I thought I can assign the values..................
Can anybody explain what has happened why my expected result didn't get?😕
 
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