father(terach, abraham).
father(terach, nachor).
father(terach, haran).
father(abraham, isaac).
father(haran, lot).
father(haran, milcah).
father(haran, yiscah).

male(terach).
male(abraham).
male(nachor).
male(haran).
male(isaac).
male(lot).
 
female(milcah).
female(yiscah).