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?

Context paragraphs:
Mirasgar Seyidov: Mirasgar Mirabdulla oglu Seyidov (Azerbaijani: "Mirəsgər Mirabdulla oğlu Seyidov" ) (6 February 1970 – 14 June 1992) - National Hero of Azerbaijan was born on February 6, 1970, in the Qaraxanbəyli village of the Nakhchivan city of Nakhchivan Autonomous Republic of Azerbaijan.

Baku: Baku ( , ; Azerbaijani: "Bakı" , ] ) is the capital and largest city of Azerbaijan, as well as the largest city on the Caspian Sea and of the Caucasus region.  Baku is located 28 m below sea level, which makes it the lowest lying national capital in the world and also the largest city in the world located below sea level.  It is located on the southern shore of the Absheron Peninsula, alongside the Bay of Baku.  At the beginning of 2009, Baku's urban population was estimated at just over two million people.  Officially, about 25 percent of all inhabitants of the country live in Baku's metropolitan area.

Aras Dam: The Aras Dam (Azerbaijani: "Araz su anbarı" ) (Persian: سَدِّ اَرَس‎ ‎ ) is an embankment dam on the Aras River along the border of Iran and Azerbaijan.  It is located downstream of Poldasht in West Azerbaijan Province, Iran and Nakhchivan City in Nakhchivan Autonomous Republic, Azerbaijan.  The primary purpose of the dam is hydroelectric power production and water supply.

Başbaşı: Başbaşı (also, Bashbashi and Bash-bashy) is a settlement in the municipality of Nakhchivan in Nakhchivan City, Nakhchivan Autonomous Republic, Azerbaijan.  It is located 12 km in the south-west from the Nakhchivan city, on the bank of the Araz River.  The station in the railway line of the Baku-Nakhchivan.  It was founded during the construction of the railway line (1908) of the Ulukhanlu (present Armenia) - Julfa.  It has not permanent population.  The salt which have got out from the salt mine of Nakhchivan, were brought to the station of "Bashbashi" via cable.  At present, the station is used as a meeting point of the trains.  There is a terminal.  The settlement covers an area of 3.2 hectares.

Ibrahim Mammadov: Ibrahim Ismayil oglu Mammadov (Azerbaijani: "İbrahim İsmayıl oğlu Məmmədov" ) (20 December 1958 – 16 February 1994) - National Hero of Azerbaijan was born on December 20, 1958, in the Nakhchivan city of Nakhchivan Autonomous Republic of Azerbaijan.

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.  The municipality of Nakhchivan consists of the city of Nakhchivan, the settlement of Əliabad and the villages of Başbaşı, Bulqan, Haciniyyət, Qaraçuq, Qaraxanbəyli, Tumbul, Qarağalıq, and Daşduz.  It is spread over the foothills of Zangezur Mountains, on the right bank of the Nakhchivan River at an altitude of 873 m above sea level.

Daşduz: Daşduz (also, Dashduz and Dash-duz) is a settlement in the municipality of Nakhchivan in Nakhchivan City, Nakhchivan Autonomous Republic, Azerbaijan.  It is located 12 km in the south-west from the Nakhchivan city, on the foothill area.  There is no permanent population.

Qarğalıq, Nakhchivan: Qarağalıq (also, Garghalyg, Gargalig and Karqalyk) is a settlement in the municipality of Nakhchivan in Nakhchivan City, Nakhchivan Autonomous Republic, Azerbaijan.  It is located 7 km in the south-west from the city center, on the bank of the Araz River.  The station in the railway line of the Baku-Nakhchivan.  It was founded during the construction of the railway line (1908) of the Ulukhanlu (present Armenia) - Julfa.  It has not permanent population.  At present, the station is used as a meeting point of the trains.  There is a terminal.

Geography of Azerbaijan: Azerbaijan is situated in the Caucasus region of Eurasia.  Three physical features dominate Azerbaijan: the Caspian Sea, whose shoreline forms a natural boundary to the east; the Greater Caucasus mountain range to the north; and the extensive flatlands at the country's center.  About the size of Portugal or the state of Maine, Azerbaijan has a total land area of approximately 86,600 square kilometers, less than 1% of the land area of the former Soviet Union.  Of the three Transcaucasian states, Azerbaijan has the greatest land area.  Special administrative subdivisions are the Nakhchivan Autonomous Republic, which is separated from the rest of Azerbaijan by a strip of Armenian territory, and the Nagorno-Karabakh Autonomous Region, entirely within Azerbaijan.  (The status of Nagorno-Karabakh was under negotiation in 1994.)  Located in the region of the southern Caucasus Mountains, Azerbaijan borders the Caspian Sea to the east, Georgia and Russia to the north, Iran to the south, and Armenia to the southwest and west.  A small part of Nakhchivan also borders Turkey to the northwest.  The capital of Azerbaijan is the ancient city of Baku, which has the largest and best harbor on the Caspian Sea and has long been the center of the republic's oil industry.

Supreme Assembly of Nakhchivan: The Supreme Assembly of the Nakhchivan Autonomous Republic (Azerbaijani: "Naxçıvan Muxtar Respublikasının Ali Məclisi" ) is the legislative assembly of Nakhchivan.  It was established in 1990 when Nakchivan declared independence from the Soviet Union to become an autonomous republic of Azerbaijan.  It governs the autonomous republic and is subordinate to the National Assembly of Azerbaijan.  The current parliamentary chairman since 1994, and "de facto" leader of Nakhchivan, is Vasif Talibov.

Supporting paragraphs: Qarğalıq, Nakhchivan Baku
Answer: Baku