paragraph_text: The USRA Heavy Pacific was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard heavy passenger locomotive of the USRA types, and was 4-6-2 wheel arrangement in the Whyte notation, or 2′C1′ in UIC classification.

paragraph_text: The USRA 2-6-6-2 was a standardized design of 2-6-6-2 Mallet locomotives developed by the United States Railroad Administration during World War I.

paragraph_text: The United States Railroad Administration (USRA) was the name of the nationalized railroad system of the United States between December 28, 1917, and March 1st, 1920. It was possibly the largest American experiment with nationalization, and was undertaken against a background of war emergency.

paragraph_text: The USRA 0-6-0 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light switcher of the USRA types, and was of 0-6-0 wheel arrangement in the Whyte notation, or "C" in UIC classification.

paragraph_text: The ferry trip takes approximately 80 minutes and provides a view of three lighthouses: the Cape May Light in New Jersey, and the Harbor of Refuge Light and Delaware Breakwater East End Light near Lewes.

paragraph_text: The USRA 2-8-8-2 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-8-2 wheel arrangement in the Whyte notation, or (1'D)'D1' in UIC classification. A total of 106 locomotives were built to this plan for the USRA; postwar, it became a de facto standard design.

paragraph_text: The USRA Light Pacific was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light passenger locomotive of the USRA types, and was 4-6-2 wheel arrangement in the Whyte notation, or 2′C1′ in UIC classification.

paragraph_text: The USRA Heavy Santa Fe was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-10-2 wheel arrangement in the Whyte notation, or 1′E1′ in UIC classification; this arrangement was commonly named "Santa Fe" in the United States. At the time, the Santa Fe was the largest non-articulated type in common use, primarily in slow drag freight duty in ore or coal service.

paragraph_text: St. Louis–San Francisco 4003 is a 2-8-2, Mikado type, standard gauge steam railway locomotive built by the American Locomotive Company in 1919 as a standard USRA Light Mikado for the Pennsylvania Railroad. The PRR, for unknown reasons, rejected 33 of 38 locomotives in the order. The United States Railroad Administration reassigned 23 of them (road numbers 4000-4007 and 4017-4031) to the St. Louis–San Francisco Railway (SLSF), also known as the "Frisco". The Frisco also received 10 sisters from the Indiana Harbor Belt Railroad (road numbers 4008-4016 and 4032), making 33 in all. She is now on display at the Fort Smith Trolley Museum in Fort Smith, Arkansas.

paragraph_text: The light - year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light - year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word ``year '', the term light - year is sometimes misinterpreted as a unit of time, as a year is a unit of time equivalent to approximately 365 days.

paragraph_text: German record company Odeon is often said to have pioneered the album in 1909 when it released the Nutcracker Suite by Tchaikovsky on 4 double-sided discs in a specially designed package. (It is not indicated what size the records are.) However, Deutsche Grammophon had produced an album for its complete recording of the opera Carmen in the previous year. The practice of issuing albums does not seem to have been widely taken up by other record companies for many years; however, HMV provided an album, with a pictorial cover, for the 1917 recording of The Mikado (Gilbert & Sullivan).

paragraph_text: The light - year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light - year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word ``year '', the term light - year is sometimes misinterpreted as a unit of time.

paragraph_text: Mikado Glacier () is a glacier on the north side of Mahler Spur, flowing west-northwest into Sullivan Glacier near the junction with Gilbert Glacier in northern Alexander Island, Antarctica. The glacier was so named by the UK Antarctic Place-Names Committee in 1977 in association with nearby Gilbert Glacier and Sullivan Glacier, after the operetta "The Mikado".

paragraph_text: The USRA Light Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light freight locomotive of the USRA types, and was of 2-8-2 wheel arrangement in the Whyte notation, or 1′D1′ in UIC classification.

paragraph_text: The USRA 0-8-0 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard heavy switcher of the USRA types, and was of 0-8-0 wheel arrangement in the Whyte notation, or "D" in UIC classification.

paragraph_text: The USRA Heavy Mountain was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light freight locomotive of the USRA types, and was of 4-8-2 wheel arrangement in the Whyte notation, or 2′D1′ in UIC classification.

paragraph_text: The USRA Heavy Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration (USRA), the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-2 wheel arrangement in the Whyte notation, or 1′D1′ in UIC classification. A total of 233 locomotives were built to this plan for the USRA; postwar, it became a "de facto" standard design, which was built to the total of 957 locomotives including the USRA originals and all subsequent copies.

paragraph_text: In order to specifically measure the amount of light entering the eye, personal circadian light meter called the Daysimeter has been developed. This is the first device created to accurately measure and characterize light (intensity, spectrum, timing, and duration) entering the eye that affects the human body's clock.

paragraph_text: Mikado Ryūgamine, a young boy who longs for the exciting life of the big city, moves to Ikebukuro to attend Raira Academy with his childhood friend Masaomi Kida, whom he has not seen since he was young. After the two meet at the train station, they set out to explore the streets of Ikebukuro. Masaomi warns Mikado about people he does not want to cross in the city such as the violent and superhumanly strong man Shizuo Heiwajima, the information broker Izaya Orihara, and the mysterious gang known as "The Dollars." After running into some of the side characters, Mikado sees a local legend called the "Black Rider" who rides around Ikebukuro on a black motorcycle that occasionally neighs like a horse and who is rumored to have no head under her helmet. The "Black Rider's" real name is Celty Sturluson; she is an Irish dullahan who is in Ikebukuro looking for her stolen head while working as an underworld courier. The narrative follows all of the characters equally, showing how their lives intersect and create a greater plot line from each character's knowledge about a common incident.

paragraph_text: The first remote intended to control a television was developed by Zenith Radio Corporation in 1950. The remote, called ``Lazy Bones '', was connected to the television by a wire. A wireless remote control, the`` Flashmatic'', was developed in 1955 by Eugene Polley. It worked by shining a beam of light onto a photoelectric cell, but the cell did not distinguish between light from the remote and light from other sources. The Flashmatic also had to be pointed very precisely at the receiver in order to work.

Question: Which year did the developer of USRA Light Mikado end?
Answer: 1920