New Perspectives on Computer Concepts 2014 17th Edition by June Jamrich Parsons ,Dan Oja

Exercise 25

While browsing through several programs posted online, you come across the following code and realize it is written using the
programming language.
male(frodo).
male(mungo).
male(largo).
male(balbo).
female(berylla).
female(belladonna).
female(primula).
female(sella).
parents(mungo,berylla,balbo).
parents(frodo,primula,drogo).
parents(largo,berylla,balbo).
parents(sella,berylla,balbo).
brother_of(X,Y):-
male(Y),
parents(X,Mother,Father),
parents(Y,Mother,Father).