Complex sentence: The decline of the Gaeltachtaí and the failure of state directed revitalisation have been countered by an urban revival movement, largely based on an independent community-based school system, known generally as Gaelscoileanna.
Split into simpler sentences: The decline of the Gaeltachtaí and the failure of state directed revitalisation have been countered by an urban revival movement. This is largely based on an independent community-based school system, known generally as Gaelscoileanna.