Then the relationship takes_course has the type [Student, Course] {that is a tuple with two attributes of type student & course as in {[s1,db],…}].
Kisha uhusiano takes_course ina aina [Mwanafunzi, kozi] {yaani tuple na sifa mbili za aina mwanafunzi & shaka kama katika {[S1, db], …}].