Complex sentence: A one-off in 1988, similar to It's a Royal Knockout but without royal involvement, took place at locations around Walt Disney World in Florida, and featured celebrity teams representing the UK, USA, and Australia.
Split into simpler sentences: A one-off event in 1988, similar in format to It's a Royal Knockout, but without the royal involvement. The event took place at numerous locations around Walt Disney World in Florida, and featured celebrity teams representing the UK, USA, and Australia.