Complex sentence: Boothstown Mines Rescue Station opened by the Lancashire and Cheshire Coalowners in 1933 close to the East Lancashire Road, was permanently staffed by two rescue teams who attended emergencies across the entire coalfield.
Split into simpler sentences: Boothstown Mines Rescue Station opened by the Lancashire and Cheshire Coalowners in 1933 was close to the East Lancashire Road. It was permanently staffed by two rescue teams who attended emergencies across the entire coalfield.