:- [school_128].

professor_popularity(p0,h) :- {}.
professor_popularity(p3,h) :- {}.
professor_popularity(p5,l) :- {}.
professor_popularity(p45,h) :- {}.
professor_popularity(p15,m) :- {}.

course_rating(c0, a) :- {}.
course_rating(c1, b) :- {}.
course_rating(c2, c) :- {}.
course_rating(c3, a) :- {}.
course_rating(c4, a) :- {}.
course_rating(c5, d) :- {}.
course_rating(c62, b) :- {}.