Complex sentence: The Nature One is a large open air Techno festival, featuring many renowned Djs from Germany and all over the world, in significance it's not as big as Mayday nor as old, having started 3 years later than Mayday festival.
Split into simpler sentences: The Nature One is a large open air Techno festival, featuring many renowned Djs from Germany and all over the world. In significance it's not as big as Mayday nor as old, having started 3 years later than Mayday festival.