Complex sentence: An assessment made during the New Year's Eve 1992 highlighted the risks associated with the dispersal of increasing crowd numbers on Copacabana beach after the fireworks display and as from the 1993/94 event concerts have been held on the beach to retain the public.
Split into simpler sentences: An assessment made during the New Year's Eve 1992 highlighted the risks associated with increasing crowd numbers on Copacabana beach after the fireworks display. Since the 1993-94 event concerts have been held on the beach to retain the public.