Complex sentence: A depot for trains operating on the line was planned at a location approximately 51 km from Tokyo, including a single-track connecting link to the JR Narita Line at Shimōsa-Manzaki Station.
Split into simpler sentences: A depot for trains operating on the line was planned at a location approximately 51 km from Tokyo. It also included a single-track connecting link to the Narita Line at Shimousa-Manzaki Station.