Complex sentence: The is a heavy rail line in Fukuoka Prefecture in Kyūshū, Japan, being the main line of a Japanese private railway company Nishi-Nippon Railroad (Nishitetsu).
Split into simpler sentences: The is a heavy rail line in Fukuoka Prefecture in Kyushu, Japan. It is the main line of the private railway company Nishi-Nippon Railroad (Nishitetsu).