Complex sentence: Similarly, since 1986 Tir Penrhos Tsaf has tried several times to get planning permission and only succeeded in December 2006, twenty years after their first planning application was submitted.
Split into simpler sentences: Similarly, since 1986 Tir Penrhos Tsaf has tried several times to get planning permission. It only received planning permission in December 2006, twenty years after their first planning application was submitted.