Complex sentence: The building does not use mortar or cement to bind stones together, all of its pieces are carved stones joined together by a system of carved interlocking positive and negative pieces; a specially constructed train line was used to transport these large blocks of stone.
Split into simpler sentences: The building does not use mortar or cement to bind stones together; all of its pieces are carved stones joined together by a system of carved interlocking positive and negative pieces. A specially constructed train line was used to transport these large blocks of stone.