Complex sentence: Altan are an Irish folk music group formed in County Donegal in 1987 by lead vocalist Mairéad Ní Mhaonaigh and her since-deceased husband Frankie Kennedy.
Split into simpler sentences: Altan are an Irish folk music group. They were formed in County Donegal in 1987 by lead vocalist Mairéad Ní Mhaonaigh and her since-deceased husband Frankie Kennedy.