Complex sentence: This last rebellious government is the "Revived Roman Empire" and it depends upon a special ore for interplanetary travel, the bulk of which ore is found on a distant province, Sybaris, a desert planet coming to be known as Resurrection Planet.
Split into simpler sentences: This last rebellious government is the "Revived Roman Empire" and it depends upon a special ore for interplanetary travel. The bulk of this ore is found on a distant province, Sybaris, a desert planet coming to be known as Resurrection Planet.