Those employees which were working on the upper floors of the building were unaware of the fire.

Those employees which were working on the upper floors of the building were unaware of the fire. (*) which (*) on (*) were (*) of


This is a companion discussion topic for the original entry at https://english.best/questions/24139,those-employees-uwhichu-were-working-uonu-the-upper-floors-of-the-building-uwereu-unaware-uofu-the-fire/