Question: What was the first underground line in the death city of the artist responsible for the creation of Venus and Amor?

full_context: Document 1: Portrait of Sir Thomas More (Holbein): The work was created during the period from 1526 when Holbein lived in London. He gained the friendship of the Dutch humanist Desiderius Erasmus, who recommended that he befriend More, then a powerful, knighted speaker at the English Parliament.
Document 2: Portrait of Henry VIII: Portrait of Henry VIII is a lost work by Hans Holbein the Younger depicting Henry VIII. It was destroyed by fire in 1698, but is still well known through many copies. It is one of the most iconic images of Henry and is one of the most famous portraits of any British monarch. It was originally created in 1536–1537 as part of a mural showing the Tudor dynasty at the Palace of Whitehall, London.
Document 3: Railway electrification in Great Britain: The first electric railway in Great Britain was Volk's Electric Railway in Brighton, a pleasure railway, which opened in 1883, still functioning to this day. The London Underground began operating electric services using a fourth rail system in 1890 on the City and South London Railway, now part of the London Underground Northern line. The Liverpool Overhead Railway followed in 1893, being designed from the outset to be electric traction, unlike the City and South London Railway which was designed to be cable hauled initially. Main line electrification of some suburban lines began in the early years of the 20th century, using a variety of different systems. In 1921 a government committee chose 1,500 V DC overhead to be the national standard, but little implementation followed and many different systems co-existed. During the interwar period, the Southern Railway adopted the 660 V DC third rail system as its standard and greatly expanded this system across its network of lines south of London.
Document 4: Mars and Venus with Cupid and a Dog: Mars and Venus with Cupid and a Dog is a oil painting by Paolo Veronese. It was painted around 1580 and is in the collection of the National Gallery of Scotland in Edinburgh. Venus is portrayed sitting on Mars' knee, and she wears a fur. At their feet is Cupid and a lapdog.
Document 5: Venus and Amor: Venus and Amor (also known as Venus and Cupid) is a c. 1524 painting by the German painter and printmaker Hans Holbein the Younger, conserved in the Kunstmuseum Basel, Switzerland. Although the work is Holbein's earliest mythological painting, depicting the Roman goddess of love, Venus, with her son Amor (Cupid), the model is believed to be his friend Magdalena Offenburg. They are shown in front of a large hanging green curtain and behind a low parapet. Venus is depicted with an open gesture and sincere gaze. Cupid is seen climbing onto the parapet while holding love's arrow in his left hand. He has red-orange hair, rendered in the same colouring and tone of the rich cloth sleeves covering his mother's upper arms.
Document 6: London Underground: 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.
Document 7: Venus with a Mirror: Venus with a Mirror (about 1555) is a painting by Titian, now in the National Gallery of Art in Washington, DC, and it is considered to be one of the collection's highlights.
Document 8: List of metro systems: This list of metro systems includes electrified rapid transit train systems worldwide. In some cases, metro systems are referred to as subways, U-Bahns or undergrounds. As of October 2014, 157 cities in 55 countries around the world host the approximately 160 metro systems that are listed here. The London Underground first opened as an ``underground railway ''in 1863 and its first electrified underground line opened in 1890, making it the world's first metro system. The metro system with the longest route length is the Shanghai Metro; the busiest one is the Beijing Subway; and the one with the most stations is the New York City Subway.
Document 9: The Worship of Venus: The Worship of Venus is an oil on canvas painting by the Italian artist Titian completed between 1518–1519, housed at the Museo del Prado in Madrid, Spain. It describes a Roman rite of worship conducted in honour of the goddess Venus each 1 April. On this occasion, women would make offerings to representations of the goddess so as to cleanse "every blemish on their bodies".
Document 10: Portrait of Christina of Denmark: Portrait of Christina of Denmark was painted with oil on oak panel by Hans Holbein the Younger in 1538. It was commissioned that year by Thomas Cromwell, agent for Henry VIII, as a betrothal painting following the death of the English Queen Jane Seymour. It shows the then sixteen-year-old Christina of Denmark, widowed Duchess of Milan. She was not a great beauty, but had a striking manner and strength of character. Although Henry was taken by her representations, the marriage proposal did not go ahead; not least because she was aware of Henry's earlier treatment of his wives, and said "If I had two heads, I would happily put one at the disposal of the King of England".
Document 11: Portrait Miniature of Margaret Roper: Portrait Miniature of Margaret Roper is a painting by the German artist and printmaker Hans Holbein the Younger created between 1535–36, and today held in the Metropolitan Museum of Art in New York. Margaret Roper (1505–44) was the eldest child of Sir Thomas More and wife of the English biographer William Roper. It is the second and less well known of two portraits of Roper painted by Holbein. The first, "Portrait of an English Woman", is generally believed to show Roper but may depict another unknown lady of the English court. The New York work was painted during the artist's second visit to London, likely in the mid-1530s.
Document 12: Darmstadt Madonna: The Darmstadt Madonna (also known as the Madonna of Jakob Meyer zum Hasen) is an oil painting by Hans Holbein the Younger. Completed in 1526 in Basel, the work shows the Bürgermeister of Basel Jakob Meyer zum Hasen, his first wife (who had died earlier), his current wife, and his daughter grouped around the Madonna and infant Jesus. The meaning of the two other male figures on the left side is, like the overall iconography of the image, not entirely clear. The image testified to the resolutely Catholic faith of the Bürgermeister, who actively opposed the Reformation.
Document 13: London Underground: London Underground A deep - level Central line train at Lancaster Gate bound for Ealing Broadway A larger sub-surface Metropolitan line train at Farringdon bound for Aldgate Overview Locale Greater London, Buckinghamshire, Essex, Hertfordshire Transit type Rapid transit Number of lines 11 Number of stations 270 served (260 owned) Daily ridership 5 million Annual ridership 1.379 billion (2016 / 17) Website London Underground Operation Began operation 10 January 1863; 154 years ago (1863 - 01 - 10) Operator (s) London Underground Limited Reporting marks LT (National Rail) Technical System length 402 km (250 mi) Track gauge 1,435 mm (4 ft 8 ⁄ in) standard gauge Electrification 630 V DC fourth rail Average speed 33 km / h (21 mph)
Document 14: Portrait of Thomas Cromwell: Portrait of Thomas Cromwell is a small oil painting by the German and Swiss artist Hans Holbein the Younger, usually dated to between 1532 and 1534, when Cromwell, an English lawyer and statesman who served as chief minister to King Henry VIII of England from 1532 to 1540, was around 48 years old. It is one of two portraits Holbein painted of him; the other is a tondo from a series of medallions of Tudor courtiers.
Document 15: London Underground: The system's first tunnels were built just below the surface, using the cut - and - cover method; later, smaller, roughly circular tunnels -- which gave rise to its nickname, the Tube -- were dug through at a deeper level. The system has 270 stations and 250 miles (400 km) of track. Despite its name, only 45% of the system is actually underground in tunnels, with much of the network in the outer environs of London being on the surface. In addition, the Underground does not cover most southern parts of Greater London, with less than 10% of the stations located south of the River Thames.
ground_truth: City & South London Railway
sub_queries: What artist was responsible for the creation of Venus and Amor? Answer: Hans Holbein
Hans Holbein >> place of death Answer: London
what was the first underground line in London Answer: City & South London Railway