input question: Information: - Serge Poliakoff (January 8, 1906 October 12, 1969) was a Russian-born French modernist painter belonging to the 'New' Ecole de Paris (Tachisme). - Concrete art is an art movement with a strong emphasis on abstraction. The artist Theo van Doesburg, closely associated with the De Stijl art movement, coined the term "concrete art" as he in 1930 founded the group Art Concret and articulated its features in a manifesto titled "The Basis of Concrete Art", signed by four other artists of the group, including Otto G. Carlsund, Jean Helion and Leon Tutundjian. The manifesto explained that the resultant art should be non-referential insofar as its components should "not" refer to, or allude to, the entities normally encountered in the natural, visible world. This is a distinction from abstraction generally. In a more general sense "abstract art" could and often does include the "abstraction of forms in nature". But "concrete art" was intended to emanate "directly from the mind" and consequently to be more "cerebral" than abstract art generally. Concrete art is often composed of basic visual features such as planes, colors, and forms. "Sentiment" tends to be absent from concrete art. The "hand" of the artist may be difficult to detect in finished works of concrete art; concrete art may appear, in some instances, to have been made by a machine. Concrete art often has a core visual reference to geometry whereas more general abstract art may find its basis in the components of the natural world. A formulation of a description of concrete art might include a considerable reliance on the formal qualities of an artwork. Theo Van Doesburg's manifesto stated that art "should receive nothing from nature's formal properties or from sensuality or sentimentality. We want to exclude lyricism, dramaticism, symbolism, etc." In concrete art a mathematical equation can serve as a starting point. Concrete art can include painting and sculpture. - Tachisme (alternative spelling: Tachism, derived from the French word "tache", stain) is a French style of abstract painting popular in the 1940s and 1950s. The term is said to have been first used with regards to the movement in 1951. It is often considered to be the European equivalent to abstract expressionism, although there are stylistic differences (American abstract expressionism tended to be more "aggressively raw" than tachisme). It was part of a larger postwar movement known as Art Informel (or "Informel"), which abandoned geometric abstraction in favour of a more intuitive form of expression, similar to action painting. Another name for Tachism is Abstraction lyrique (related to American Lyrical Abstraction). COBRA is also related to Tachisme, as is Japan's Gutai group. - Alberto Magnelli (1 July 1888 20 April 1971) was an Italian modern painter who was a significant figure in the post war Concrete art movement. - Natalia Dumitresco ( born Natalia Dumitrescu ; 1915 in Bucharest , Romania -- 1997 in Chars , France ) was a French - Romanian abstract painter associated with the Realites Nouvelles salon of Paris after the Second World War , a movement influenced by the art of Wassily Kandinsky and Alberto Magnelli . Other abstract expressionist painters associated with the Realites Nouvelles include Serge Poliakoff and Alexandre Istrati . Dumitresco later married Alexandre Istrati . After a number of years working in black and white , she tackled the problem of colors , showing originality and a great freshness of colors in her compositions . She and her husband are buried in the same grave with Constantin Brancui . Given the paragraphs above, decide what entity has the relation 'movement' with 'abstract expressionism'.???
output answer: natalia dumitresco

Problem: Given the question: Information: - Creighton Williams Abrams, Jr. (September 15, 1914 September 4, 1974) was a United States Army general who commanded military operations in the Vietnam War from 196872 (which saw U.S. troop strength in South Vietnam fall from a peak of 543,000 to 49,000). He served as Chief of Staff of the United States Army from 1972 until shortly before his death in 1974. In 1980, the U.S. Army named its new main battle tank, the "M1 Abrams", after General Abrams. The IG Farben building in Germany was also named after him from 1975 to 1995. - Heavy Equipment Transport System ( abbreviated as HETS ) is a term applied ( primarily ) to a U.S. Army logistics vehicle transport system , the primary purpose of which is to transport the M1 Abrams tank . It is also used to transport , deploy , and evacuate armored personnel carriers , self - propelled artillery , armored bulldozers and other heavy vehicles and equipment of all types . The current U.S. Army vehicle used in this role is an Oshkosh - built M1070 tractor unit which is coupled to a DRS Technologies M1000 semi-trailer . This combination replaced the earlier Oshkosh - built M911 tractor unit and M747 semi-trailer . - The Vietnam War, also known as the Second Indochina War, and known in Vietnam as Resistance War Against America or simply the American War, was a war that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam and the government of South Vietnam. The North Vietnamese army was supported by the Soviet Union, China and other communist allies and the South Vietnamese army was supported by the United States, South Korea, Australia, Thailand and other anti-communist allies and the war is therefore considered a Cold War-era proxy war. - The M1 Abrams is an American third-generation main battle tank. It is named after General Creighton Abrams, former Army chief of staff and commander of United States military forces in the Vietnam War from 1968 to 1972. Highly mobile, designed for modern armored ground warfare, the M1 is well armed and heavily armored. Notable features include the use of a powerful multifuel turbine engine, the adoption of sophisticated composite armor, and separate ammunition storage in a blow-out compartment for crew safety. Weighing nearly 68 short tons (almost 62 metric tons), it is one of the heaviest main battle tanks in service. Given the paragraphs above, decide what entity has the relation 'service retirement' with '1955'.
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The answer is:
heavy equipment transport system