Complex sentence: A Parish council has been functioning in Glencolmcille since the 1930s--known as "Comhairle Paróiste Ghleann Cholm Cille"--to look after the interests and needs of the residents of Glencolmcille.
Split into simpler sentences: A Parish Council has been functioning in Glencolmcille since the 1930s-known as "Comhairle Paróiste Ghleann Cholm Cille". The main purpose/objective of "Comhairle Pharóiste Ghleann Cholm Cille" is to look after the interests and needs of the residents of Glencolmcille.