paragraph_text: The Underground has its origins in the Metropolitan Railway, the world's first underground railway. Opened in 1863, it is now part of the Circle, Hammersmith & City and Metropolitan lines; the first line to operate underground electric traction trains, the City & South London Railway in 1890, is now part of the Northern line. The network has expanded to 11 lines, and in 2016 -- 17 carried 1.379 billion passengers, making it the world's 11th busiest metro system. The 11 lines collectively handle approximately 4.8 million passengers a day.

paragraph_text: Syed Mohammad Nasir Zaidi (born March 25, 1961) is a former cricketer for Karachi and Lancashire. Born in Karachi, Pakistan, Nasir was a right-hand batsman and leg break bowler. He played for Karachi in the 1980-81 season, though made only one one day appearance, then elected to move to England, where he trialed for the Second XI of Glamorgan, and Middlesex before Lancashire Second XI in 1983. He appeared for the Lancashire First XI from 1983 until 1985, playing 19 matches, scoring 313 runs and taking 19 wickets. After Lancashire he played Minor County cricket for Norfolk until 1986.

paragraph_text: Umeå East Station (Swedish: "Umeå Östra") is a railway station in Umeå, Sweden. The station was opened on 7 August 2010, with King Carl XVI Gustaf officially opening the station on 28 August. It was built in connection with the construction of the Bothnia Line ("Botniabanan") to Umeå.

paragraph_text: Flordon railway station was a station in Flordon, Norfolk. It opened in 1849 when the line from London to Norwich was constructed. It was closed in 1966 as part of the Beeching Axe.

paragraph_text: Salzwedel station was built in 1870 during the construction of the Stendal–Uelzen railway (part of the America Line from Berlin to Bremen and Bremerhaven) by the Magdeburg-Halberstadt Railway Company. Railways formerly ran in seven directions from Salzwedel station or Salzwedel Neustadt station (which lay to the immediate east), as the table below shows. A locomotive depot (Bahnbetriebswerk) was built directly next to it in order to service these routes. During the Second World War, the station area was destroyed in an air raid on 22 February 1945, which caused about 300 deaths. Of the seven lines, only the Stendal–Uelzen railway remain. During the division of Germany the line was cut at the border, but continuous operations were restored on 19 December 1999. It has been extensively modernised since reunification and electrified so that it can be used an alternative route for Intercity-Express train from Berlin to Hamburg.

paragraph_text: After the Russian Empire lost the Crimean War, the importance of use of tactical use of modern inventions, as well as railways. In February 1851 the Government of Russia made a decision to build the Saint Petersburg – Warsaw Railway line. Starting from 1858 the line connecting Saint Petersburg and Warsaw was being built. In the territory of Lithuania, the construction of the railway section Daugavpils–Vilnius–Grodno including the branch Lentvaris–Kaunas–Kybartai (Virbalis) was started in spring 1859. The first railway stations in Lithuania were constructed on this line (21 stations): the super class stations in Lentvaris and Virbalis, as well as the first class stations in Kaunas and Vilnius. Due to the hilly and unfavorable for the direct rail passage terrain around Kaunas' centre, the Kaunas Railway Tunnel and largest in Lithuania railway bridge over the Nemunas river were constructed. On the 15 August 1861 the first train left Kaunas and reached Lentvaris. Kaunas railway station was officially opened on 21 February 1862. In 1944, the station was bombed by the withdrawing German army.

paragraph_text: The Zwiesel–Bodenmais railway was the last railway line to be built in Lower Bavaria, a province of the state of Bavaria in southeast Germany. Today it is route number 907 in the timetable. Construction started in 1921 as part of a move to support this depressed area and it was taken into service on 3 September 1928. The 14.3 km long stub line connects to the Bavarian Forest railway from Plattling to Eisenstein opened on 16 September 1877 and also to the line to Grafenau, Bavaria (KBS 906), opened on 1 September 1890.

paragraph_text: The Beijing -- Shanghai High - Speed Railway (or Jinghu High - Speed Railway from its Chinese name) is a 1,318 - kilometre (819 mi) long high - speed railway that connects two major economic zones in the People's Republic of China, the Bohai Economic Rim and the Yangtze River Delta. Construction began on April 18, 2008, and a ceremony to mark the completion of track laying was held on November 15, 2010. The line opened to the public for commercial service on June 30, 2011. This rail line is the world's longest high - speed line ever constructed in a single phase. It is China's most profitable high speed rail line, reporting a 6.6 billion yuan net operational profit in 2015.

paragraph_text: The City & Brixton Railway (C&BR) was an authorised underground railway line in London planned to run from King William Street in the City of London under the River Thames to Brixton via The Borough, Lambeth and The Oval. The company was unable to raise funds and the railway was never constructed.

paragraph_text: Al-Nasir was the son of Caliph Al-Mustadi and a Turkish "umm walad" called "Zumurrud" (Emerald). His reign was unusual for the rise of the futuwwa groups in his reign, connected to Baghdad's long-standing ayyarun. These urban social groups had long existed in Baghdad and elsewhere, and they were often involved in urban conflicts, especially sectarian riots. Al-Nasir made them into an instrument of his government, reorganizing them along Sufi lines and ideology.

paragraph_text: Kotri Junction station is among the oldest railway stations in Pakistan. It served as the northern terminus point of the Scinde Railway, which was established in March 1855. A railway line was to be constructed between Karachi and Kotri and work on the Karachi terminus commenced in April 1858. By 13 May 1861, the station opened to the public. This was the first railway line for public traffic between Karachi and Kotri, a distance of 108 miles (174 km).

paragraph_text: The South Western line is a narrow gauge railway line in the southern part of the state of Queensland, Australia. It junctions from the Southern line immediately south of Warwick station and proceeded westwards for a distance of 413 km to the town of Dirranbandi. A western extension to Boomie, approved by the Queensland Parliament in 1914, was never constructed. The Thallon-Dirranbandi section was closed on 2 September 2010.

paragraph_text: Rama VI Bridge () is a railway bridge over the Chao Phraya River in Bangkok, in Thailand, connecting the districts Bang Sue and Bang Phlat. It was the first bridge to cross the Chao Phraya River. Construction started in December 1922 during the reign of Rama VI to link the Northern and Eastern rail lines with the southern rail lines. It was officially opened on 1 January 1927. The bridge was severely damaged during World War II, was repaired 1950-1953 and officially reopened on 12 December 1953.

paragraph_text: The usefulness of the canals was short-lived, though some have now been restored for recreation. The 19th century also saw the construction of railways to and through Somerset. The county was served by five pre-1923 Grouping railway companies: the Great Western Railway (GWR); a branch of the Midland Railway (MR) to Bath Green Park (and another one to Bristol); the Somerset and Dorset Joint Railway, and the London and South Western Railway (L&SWR). The former main lines of the GWR are still in use today, although many of its branch lines were scrapped under the notorious Beeching Axe. The former lines of the Somerset and Dorset Joint Railway closed completely, as has the branch of the Midland Railway to Bath Green Park (and to Bristol St Philips); however, the L&SWR survived as a part of the present West of England Main Line. None of these lines, in Somerset, are electrified. Two branch lines, the West and East Somerset Railways, were rescued and transferred back to private ownership as "heritage" lines. The fifth railway was a short-lived light railway, the Weston, Clevedon and Portishead Light Railway. The West Somerset Mineral Railway carried the iron ore from the Brendon Hills to Watchet.

paragraph_text: New Delhi is a major junction in the Indian railway network and is the headquarters of the Northern Railway. The five main railway stations are New Delhi railway station, Old Delhi, Nizamuddin Railway Station, Anand Vihar Railway Terminal and Sarai Rohilla. The Delhi Metro, a mass rapid transit system built and operated by Delhi Metro Rail Corporation (DMRC), serves many parts of Delhi and the neighbouring cities Faridabad, Gurgaon, Noida and Ghaziabad. As of August 2011, the metro consists of six operational lines with a total length of 189 km (117 mi) and 146 stations, and several other lines are under construction. It carries millions of passengers every day. In addition to the Delhi Metro, a suburban railway, the Delhi Suburban Railway exists.

paragraph_text: India's first railway proposals were made in Madras in 1832. The Red Hill Railway, the country's first train, ran from Red Hills to Chintadripet bridge in Madras in 1837. It was hauled by a rotary steam - engine locomotive manufactured by William Avery. Built by Arthur Cotton, the railway was primarily used to transport granite stone for road - building work in Madras. In 1845, the Godavari Dam Construction Railway was built at Dowleswaram in Rajahmundry. Also built by Cotton, it supplied stone for the construction of a dam over the Godavari River.

paragraph_text: Cowwarr is a closed station located in the town of Cowwarr, on the Maffra railway line railway line in Victoria, Australia.

paragraph_text: Middlewich railway station served the Cheshire, England, salt-producing town of Middlewich between 1868 and 1960. It lay on a branch line from Sandbach to Northwich. The Mid Cheshire Rail Users' Association is campaigning for the reopening of the line to passenger traffic, and the construction of a new station at Middlewich.

paragraph_text: Nanjing is an important railway hub in eastern China. It serves as rail junction for the Beijing-Shanghai (Jinghu) (which is itself composed of the old Jinpu and Huning Railways), Nanjing–Tongling Railway (Ningtong), Nanjing–Qidong (Ningqi), and the Nanjing-Xian (Ningxi) which encompasses the Hefei–Nanjing Railway. Nanjing is connected to the national high-speed railway network by Beijing–Shanghai High-Speed Railway and Shanghai–Wuhan–Chengdu Passenger Dedicated Line, with several more high-speed rail lines under construction.

paragraph_text: British Rail 18100 was a prototype main line gas turbine-electric locomotive built for British Railways in 1951 by Metropolitan-Vickers, Manchester. It had, however, been ordered by the Great Western Railway in the 1940s, but construction was delayed due to World War II. It spent its working life on the Western Region of British Railways, operating express passenger services from Paddington station, London.

Question: When was the first railway line between Kotri and Nasir Zaidi's birthplace constructed?
Answer: April 1858