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  1. %Forrest is the brother of Christina.
  2. brother(forrest,christina).
  3. %Christina is the sister of Forrest.
  4. sister(christina,forrest).
  5. %Forrest is a boy and Christina is a girl.
  6. gender(forrest,male).
  7. gender(christina,female).
  8. %Forrest and Christina are the children of the family.
  9. family(forrest,child).
  10. family(christina,child).
Success #stdin #stdout 0.03s 6204KB
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?-brother(forrest,christina).
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Standard output is empty
https://ideone.com/2H6Rj
language:
Prolog (swi 7.6.4)
created:
14 years ago
visibility:
public

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