Isicathamiya
Today , isicathamiya competitions in Johannesburg and Durban take place on Saturday nights , with up to 30 choirs performing from 8 o'clock at night to 8 o'clock the following morning . 
<triplet> Johannesburg <subj> Durban <obj> twinned administrative body <triplet> Durban <subj> Johannesburg <obj> twinned administrative body