(Solved) : Example Expert System Swi Prolog Im Trying Run Get Feel Work Error Dont Know Fix Main Iden Q34724063 . . . .

This an example of expert system in swi-prolog and im trying to run it so i can get a feel for how it work but there an error i dont know how to fix it main :- identify.identify:- retractall(known(_,_,_)), % clear stored information bird(X), write(‘The bird is a ‘),write(X),nl.identify:- write(‘I cant identify that bird’),nl.order(tubenose):- nostrils(external_tubular), live(at_sea), bill(hooked).order(waterfowl):- feet(webbed), bill(flat).order(falconiforms):- eats(meat), feet(curved_talons), bill(sharp_hooked).order(passerformes):- feet(one_long_backward_toe).family(albatross):- order(tubenose), size(large), wings(long_narrow).family(swan):- order(waterfowl), neck(long), color(white), flight(ponderous).family(goose):- order(waterfowl),