Complex sentence: There is a preserved Kos Minar in Lahore which is located in close proximity to Ali Mardan Khan's Tomb and probably lined the original G.T. Road, a few hundred meters north of it.
Split into simpler sentences: There is a preserved Kos Minar in Lahore, near the tomb of Ali Mardan Khan. It probably lined the original G.T. Road, a few hundred meters north of it.