how to avoid repitition in prolog

Posted by Pradeep on Stack Overflow See other posts from Stack Overflow or by Pradeep
Published on 2010-03-19T02:49:38Z Indexed on 2010/03/19 2:51 UTC
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prolog

i get several results with same outputs.

i want to get only jack,jane one time. but i get 2 times.

how to avoid it. i tried setof but i couldnt get it done. please can someone help me on this

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how to avoid repitition in prolog

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