Complex sentence: There is one ice road on Great Slave Lake, the Dettah ice road, which connects from Yellowknife, the capital of the Northwest Territories to Dettah, also in the Northwest Territories.
Split into simpler sentences: There is one ice road on Great Slave Lake, the Dettah ice road. It connects from Yellowknife, the capital of the Northwest Territories to Dettah, also in the Northwest Territories.