Complex sentence: Jatinegara railway station, one of the biggest railway stations in Jakarta, is located in Matraman Subdistrict, not in Jatinegara Subdistrict; but is located on the boundary between the subdistricts of Jatinegara and Matraman.
Split into simpler sentences: Jatinegara railway station, one of the biggest railway station in Jakarta, is located not in Jatinegara Subdistrict, but in Matraman Subdistrict. The station is located on the boundary between the Subdistrict of Jatinegara and Matraman.