Complex sentence: This complex is one of the three famous grottoes in China, which is 12 km to the south of Luyong; the other two grottoes are the Yungang Caves near Datong in Shanxi Province and the Mogao Caves near Dunhuang in Gansu Province in west China.
Split into simpler sentences: This complex is one of the three notable grottoes in China, which is 12 km to the south of Luyong. The other two grottoes are the Yungang Caves near Datong in Shanxi Province, and the Mogao Caves near Dunhuang in Gansu Province in west China.