Complex sentence: Its sandstone spire reaches a height of 56 m (182 ft) and is the tallest church spire in New South Wales, the twin 70m spires of Sydney's St Mary's Cathedral completed in 2000 are taller but are steel cored.
Split into simpler sentences: Its sandstone spire reaches a height of and is the tallest church spire in New South Wales. Only the twin spires of Sydney's St Mary's Cathedral completed in 2000 are taller, but are steel cored.