Complex sentence: The format for 2008 is the same as that used in 2007 with 16 riders taking part in each Grand Prix and over the course of 20 heats each rider will race against every other rider once.
Split into simpler sentences: The format for 2008 was the same as that used in 2007 with 16 riders taking part in each Grand Prix. Over the course of 20 heats each rider raced against every other rider once.