Complex sentence: The Hong Kong Schools Speech Festival is one of Hong Kong's largest inter-school competitions organized by the Hong Kong Schools and Music Association, in which primary and secondary school students across Hong Kong participate in speeches in English and Chinese.
Split into simpler sentences: The Hong Kong Schools Speech Festival is one of Hong Kong's largest inter-school competitions, and is organized by the Hong Kong Schools and Music Association. Primary and secondary school students across Hong Kong deliver speeches in English and Chinese.