Question: What is the largest city on the Caspian Sea and of the Caucasus region, has a railway line in the station in a settlement in the municipality of Nakhchivan in Nakhchivan City, Nakhchivan Autonomous Republic, Azerbaijan?
Sentence (from "Qarğalıq, Nakhchivan"): It is located 7 km in the south-west from the city center, on the bank of the Araz River.
Relevant evidence: No