paragraph_text: In the developing chordate (including vertebrates), the neural tube is the embryo's precursor to the central nervous system, which comprises the brain and spinal cord. The neural groove gradually deepens as the neural folds become elevated, and ultimately the folds meet and coalesce in the middle line and convert the groove into the closed neural tube. In humans, neural tube closure usually occurs by the fourth week of pregnancy (28th day after conception). The ectodermal wall of the tube forms the rudiment of the nervous system. The centre of the tube is the neural canal.

paragraph_text: 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.

paragraph_text: The Prince and the Showgirl (originally called The Sleeping Prince) is a 1957 British - American romantic comedy film starring Marilyn Monroe and Laurence Olivier. Olivier also served as director and producer. The screenplay by Terence Rattigan was based on his 1953 stage play The Sleeping Prince. It was filmed in London.

paragraph_text: The Eustachian tube / juː ˌsteɪ. ʃən /, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth - century anatomist Bartolomeo Eustachi.

paragraph_text: Several tubes burned out almost every day, leaving ENIAC nonfunctional about half the time. Special high-reliability tubes were not available until 1948. Most of these failures, however, occurred during the warm-up and cool-down periods, when the tube heaters and cathodes were under the most thermal stress. Engineers reduced ENIAC's tube failures to the more acceptable rate of one tube every two days. According to an interview in 1989 with Eckert, "We had a tube fail about every two days and we could locate the problem within 15 minutes."

paragraph_text: Purely electronic circuit elements soon replaced their mechanical and electromechanical equivalents, at the same time that digital calculation replaced analog. The engineer Tommy Flowers, working at the Post Office Research Station in London in the 1930s, began to explore the possible use of electronics for the telephone exchange. Experimental equipment that he built in 1934 went into operation 5 years later, converting a portion of the telephone exchange network into an electronic data processing system, using thousands of vacuum tubes. In the US, John Vincent Atanasoff and Clifford E. Berry of Iowa State University developed and tested the Atanasoff–Berry Computer (ABC) in 1942, the first "automatic electronic digital computer". This design was also all-electronic and used about 300 vacuum tubes, with capacitors fixed in a mechanically rotating drum for memory.

paragraph_text: In electronics, the dynatron oscillator, invented in 1918 by Albert Hull at General Electric, is an obsolete vacuum tube electronic oscillator circuit which uses a negative resistance characteristic in early tetrode vacuum tubes, caused by a process called secondary emission. It was the first negative resistance vacuum tube oscillator. The dynatron oscillator circuit was used to a limited extent as beat frequency oscillators (BFOs), and local oscillators in vacuum tube radio receivers as well as in scientific and test equipment from the 1920s to the 1940s but became obsolete around World War 2 due to the variability of secondary emission in tubes.

paragraph_text: The Crookes tube was improved by William Coolidge in 1913. The Coolidge tube, also called hot cathode tube, is the most widely used. It works with a very good quality vacuum (about 10 Pa, or 10 Torr).

paragraph_text: Elizabeth Berkley Lauren (born July 28, 1972) is an American actress and reality show personality. Berkley's most notable roles were as Jessie Spano in the television series Saved by the Bell, and as Nomi Malone in the 1995 Paul Verhoeven film Showgirls.

paragraph_text: 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)

paragraph_text: The Transbay Tube is an underwater rail tunnel which carries Bay Area Rapid Transit's four transbay lines under San Francisco Bay between the cities of San Francisco and Oakland in California. The tube is long; including the approaches from the nearest stations (one of which is underground), it totals in length. It has a maximum depth of below sea level.

paragraph_text: Rover Dangerfield is a 1991 American animated musical comedy film starring the voice talent of comedian Rodney Dangerfield, who also wrote and co-produced the film. It is about a street dog named Rover, who is owned by a Las Vegas showgirl. Rover gets dumped off Hoover Dam by the showgirl's boyfriend. However, rather than drowning, Rover ends up on a farm.

paragraph_text: The mini gastric bypass procedure was first developed by Robert Rutledge from the US in 1997, as a modification of the standard Billroth II procedure. A mini gastric bypass creates a long narrow tube of the stomach along its right border (the lesser curvature). A loop of the small gut is brought up and hooked to this tube at about 180 cm from the start of the intestine

paragraph_text: Trinidad is an elevated metro station on the Line 4 of the Santiago Metro, in Santiago, Chile. The side platforms and tracks are wrapped in a large elliptical cross section tube. The station has a mezzanine area below the tracks.

paragraph_text: Brondesbury Park is a suburb and electoral ward of the London Borough of Brent. It is the part of Brondesbury which is not interwoven with Kilburn due to the naming of a major tube station (Kilburn) and is centred on Brondesbury Park railway station and the street, an avenue, which shares its name. The area has a number of open spaces, primarily: Queen's Park and Tiverton Green.

paragraph_text: Elizabeth Berkley Lauren (born July 28, 1972) is an American actress. Berkley's most notable roles were as Jessie Spano in the television series Saved by the Bell, and as Nomi Malone in the 1995 Paul Verhoeven film Showgirls.

paragraph_text: The Eustachian tube, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth - century anatomist Bartolomeo Eustachi.

paragraph_text: When the studio was still reluctant to change Monroe's contract, she founded a film production company in late 1954; she named it Marilyn Monroe Productions (MMP). She dedicated 1955 to building her company and began studying method acting at the Actors Studio. In late 1955, Fox awarded her a new contract, which gave her more control and a larger salary. Her subsequent roles included a critically acclaimed performance in Bus Stop (1956) and the first independent production of MMP, The Prince and the Showgirl (1957). Monroe won a Golden Globe for Best Actress for her work in Some Like It Hot (1959), a critical and commercial success. Her last completed film was the drama The Misfits (1961).

paragraph_text: CIRX-FM is a Canadian radio station broadcasting at 94.3 FM in Prince George, British Columbia. The station airs an active rock format branded on-air as 94.3 The Goat: World Class Rock.

paragraph_text: Old Kupferdreh station () was built by the Prussian state railways in the Essen district of Kupferdreh in the German state of North Rhine-Westphalia and opened in 1898 on the Prince William Railway. The station is close to the start of the first German railway, which was opened on 20 September 1831 by the Deil Valley Railway Company to Nierenhof.

Question: What was the first tube station in the place where The Prince And The Showgirl was filmed?
Answer: 10 January 1863