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Text File  |  1996-06-04  |  215b  |  7 lines
  1. :: P:married_person(spouse=>person(spouse=>P)).
  2. married_person <| person.
  3. delay_check(person)?
  4.  
  5. db([J:person(spouse=>M),M:person(spouse=>J)]).
  6. db2([_A:married_person(spouse => _B:married_person(spouse => _A)),_B]).
  7.