Question: Which Argentinian Province capital was on the Andean Railway line built towards the end of the 19th century?

Context paragraphs:
William Dargan: William Dargan (28 February 1799 – 7 February 1867) was arguably the most important Irish engineer of the 19th century and certainly the most important figure in railway construction.  Dargan designed and built Ireland's first railway line from Dublin to Dún Laoghaire in 1833.  In total he constructed over 1,300 km (800 miles) of railway to important urban centres of Ireland.  He was a member of the Royal Dublin Society and also helped establish the National Gallery of Ireland.  He was also responsible for the Great Dublin Exhibition held at Leinster lawn in 1853.  His achievements were honoured in 1995, when the Dargan Railway Bridge in Belfast was opened, and again in 2004 when the Dargan Bridge, Dublin a new cable stayed bridge for Dublin's Light Railway Luas were both named after him.

Marine Lines: Marine Lines is a locality in South Mumbai.  The name "Marine Lines" is derived from the Marine Battalion Lines, a military establishment built by the British in the 19th century.  The battalion was later converted to an air force residential quarters, and now lies just south of Metro Adlabs.  It is also the name of a railway station on the Mumbai suburban railway on the Western Railway railway line.  Marine Lines was also the name of the road on which Bombay Hospital and Liberty Cinema stand.  It is now known as V Thackersey Marg.  Marine Drive is the famous promenade near the station.  Marine Drive has one of the finest Art Deco Residential Buildings facing the sea.

Wheelock &amp; Sandbach railway station: Wheelock & Sandbach railway station was built by the North Staffordshire Railway (NSR) to serve the Cheshire village of Wheelock.  Originally conceived as a line between Stoke-upon-Trent and Liverpool (an idea abandoned as part of an agreement with the Grand Junction Railway in 1845), the short (6.5 mi ) line from Lawton Junction to Ettiley Heath was opened as a goods traffic only line in 1852.  Subsequently, the line was extended to join with the London and North Western Railway at in 1866.  Towards the end of the 19th century the NSR decided to introduce a passenger service on the line and Sandbach (Wheelock) railway station was opened in July 1893 as the terminus of the new service from .

Central Chubut Railway: The Central Chubut Railway (in Spanish: Ferrocarril Central del Chubut) was a British-owned company that built and operated a railway line in the Argentine province of Chubut in the Patagonia region at the end of the 19th.  century.

Listed buildings in St Helens, Merseyside: St Helens is a district in the Metropolitan Borough of St Helens, Merseyside, England.  The unparished area contains 67 buildings that are recorded in the National Heritage List for England as designated listed buildings. Of these, one is listed at Grade I, the highest grade, four are listed at Grade II*, the middle of the three grades, and the others are at Grade II, the lowest grade.  The main town in the district is St Helens, the others being Newton-le-Willows and Earlestown.  Until the Industrial Revolution, the area was largely rural.  Coal mining began in the 16th century, but modern industrial development began with the construction of the Sankey Canal in the late 18th century, linking St Helens with the River Mersey.  The early 19th century saw new industries, including copper smelting, production of alkali, and the manufacture of glass.  Of these, the major industry was glass making, the main business being that of Pilkingtons.  The first major railway line in the world, the Liverpool and Manchester Railway was built through the district, opening in 1830.

Matale railway station: Matale Railway Station is the terminus railway station on the Matale railway line of Sri Lanka.  It is the 65th railway station on the line from Colombo Fort railway station and is located in the Matale District in the Central Province.  It is 148.6 km from the Colombo Fort Railway Station and 27.64 km from the Kandy Railway Station. it's the end of railway line, because of water flowing beneath the ground, railway lines cannot be constructed beyond matale.

Villa María and Rufino Railway: The Villa María and Rufino Railway (VM&RR) (native name: Ferrocarril Villa María a Rufino) was a British-owned company that, towards the end of the 19th century, built and operated a broad gauge, , railway line in Argentina.

Andean Railway: The Andean Railway (native name: Ferrocarril Andino) was a state-owned railway company in Argentina which, towards the end of the 19th century, built and operated a line connecting Villa María in Córdoba Province with the cities of Mendoza, San Luis and San Juan.  The network was later sold to a number of British-owned railway companies.

San Luis, Argentina: San Luis is the capital city of San Luis Province in the Cuyo region of Argentina.  It is also the seat of the Juan Martín de Pueyrredón Department.

Tanintharyi Line: Tanintharyi Line is a gauge railway line in Myanmar's southernmost region, Tanintharyi Region, operated by Myanmar Railways.  The line runs from Mawlamyine Railway Station (Moulmein) to the Dawei area, with connections to Yangon Central Railway Station, it is under construction extending towards Myeik from the current terminus of Thayetchaung Station, which lies just after Dawei Station.  Current section in operation includes the part from Mawlamyaing Station to Thayetchaung.  It is expected to become a part of a pan-Asian railway network, allowing spur connections specifically to Thailand.  A spur connection (95 km as the crow flies) between the SRT rail head at Nam Tok Station in Kanchanaburi Province to Dawei Station through mountains is planned by Thai interests backed by Japanese funding, though other rail connections are certainly possible.  Until then, there is an air bridge in the north end with Nok Air flights from Mae Sot Airport, Thailand to Mawlamyaing to bypass rough and politically conflicted overland connections.

Supporting paragraphs: Andean Railway San Luis, Argentina
Answer: San Luis