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father comparison table
Subject documentation have arg1 valence have domain1 have axiom
unparented    
fatherThe general relationship of fatherhood. (father ?FATHER ?CHILD) means that ?FATHER is the biological father of ?CHILDsingleValuedAnimal
(=>
    (parent ?PARENT ?CHILD)
    (or
       (mother ?PARENT ?CHILD)
       (father ?PARENT ?CHILD)))

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