Please answer the following question: Information:  - The English Channel ("the Sleeve" [hence ] "Sea of Brittany" "British Sea"), also called simply the Channel, is the body of water that separates southern England from northern France, and joins the southern part of the North Sea to the rest of the Atlantic Ocean.  - Kent is a county in South East England and one of the home counties. It borders Greater London to the north west, Surrey to the west, East Sussex to the south west, and Essex across the Thames Estuary to the north. The county town is Maidstone.   - The Seikan Tunnel ("Seikan Tonneru" or "Seikan Zuid") is a dual gauge railway tunnel in Japan, with a long portion under the seabed. The track level is about below the seabed and below sea level. It extends beneath the Tsugaru Straitconnecting Aomori Prefecture on the main Japanese island of Honshu with the northern island of Hokkaidoas part of the standard gauge Hokkaido Shinkansen and the narrow gauge Kaikyo Line portion of the Hokkaido Railway Company (JR Hokkaido)'s Tsugaru-Kaiky Line. The name "Seikan" comes from combining the "on'yomi" readings of the first characters of , the nearest major city on the Honshu side of the strait, and , the nearest major city on the Hokkaido side.  - Europorte is a European rail freight company , a subsidiary of Eurotunnel ; operating in France and through the Channel Tunnel . The company was formed in 2009 as an entity encompassing the previous operations of Europorte 2 and the France - based businesses of Veolia Cargo . Eurotunnel 's original freight business , Europorte 2 , was rebranded to become Europorte Channel and moved as a subsidiary under the Europorte division of the Eurotunnel group .  - The Strait of Dover or Dover Strait, historically known as the Dover Narrows (, "Strait of Calais"; or "Straat van Dover"), is the strait at the narrowest part of the English Channel, marking the boundary between the Channel and North Sea, separating Great Britain from continental Europe. The shortest distance across the strait, 33.3 kilometres (20.7 miles), is from the South Foreland, northeast of Dover in the county of Kent, England, to Cap Gris Nez, a cape near to Calais in the French "" of Pas-de-Calais, France. Between these points lies the most popular route for cross-channel swimmers.  - Calais (, traditionally  ) is a town and major ferry port in northern France in the department of Pas-de-Calais, of which it is a sub-prefecture. Although Calais is by far the largest city in Pas-de-Calais, the department's prefecture is its third-largest city of Arras. The population of the metropolitan area at the 2010 census was 126,395. Calais overlooks the Strait of Dover, the narrowest point in the English Channel, which is only wide here, and is the closest French town to England. The White Cliffs of Dover can easily be seen on a clear day from Calais. Calais is a major port for ferries between France and England, and since 1994, the Channel Tunnel has linked nearby Coquelles to Folkestone by rail.  - The London Stock Exchange (LSE) is a stock exchange located in the City of London in the United Kingdom. , the Exchange had a market capitalisation of US$6.06 trillion (short scale), making it the third-largest stock exchange in the world by this measurement (the largest in Europe, ahead of Euronext). The Exchange was founded in 1801 and its current premises are situated in Paternoster Square close to St Paul's Cathedral in the City of London. The Exchange is part of the London Stock Exchange Group.  - France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans and had a total population of almost 67 million people as of January 2017. It is a unitary semi-presidential republic with the capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse and Bordeaux.  - Folkestone is a port town on the English Channel, in Kent, south-east England. The town lies on the southern edge of the North Downs at a valley between two cliffs. It was an important harbour and shipping port for most of the 19th and 20th century.  - A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.  - Euronext Paris is France's securities market, formerly known as the Paris Bourse, which merged with the Amsterdam, Lisbon and Brussels exchanges in September 2000 to form Euronext NV, which is the second largest exchange in Europe behind the UK's London Stock Exchange Group.   - Groupe Eurotunnel SE manages and operates the Channel Tunnel between Britain and France including the vehicle shuttle services, and earns revenue on other trains (DB Schenker freight and Eurostar passenger) through the tunnel. It is listed on both the Euronext London and Euronext Paris markets, and was listed on the London Stock Exchange until 19 July 2012. The company is based in Paris.  - Eurostar is a high-speed railway service connecting London with Avignon, Brussels, Lille, Lyon, Marseille and Paris. All its trains traverse the Channel Tunnel between the United Kingdom and France, owned and operated separately by Eurotunnel.  - Coquelles is a commune in the Pas-de-Calais department near Calais in northern France.  - The Channel Tunnel (also nicknamed and shortened to Chunnel) is a rail tunnel linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France, beneath the English Channel at the Strait of Dover. At its lowest point, it is deep. At , the tunnel has the longest undersea portion of any tunnel in the world, although the Seikan Tunnel in Japan is both longer overall at and deeper at below sea level. The speed limit for trains in the tunnel is .    What is the relationship between 'europorte' and 'lille'?
A:
headquarters location