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 "Nakhchivan (city)"): The city of Nakhchivan (Azerbaijani: Naxçıvan , "Нахчыван", ناخجیوان) is the capital of the eponymous Nakhchivan Autonomous Republic of Azerbaijan, located 450 km west of Baku.
Relevant evidence: No