Question: Who died first, Dmitri Anosov or Jakow Trachtenberg?

Context articles: Ostap Dashkevych
Grand Theft Parsons
Jakow Trachtenberg
Dmitri Anosov
Trachtenberg system
Ninan Cuyochi
Tsarevich Dmitry Ivanovich of Russia (1552–1553)
String Quartet No. 7 (Shostakovich)

Eustachy Daszkiewicz or Ostap Daszko (Russian: Евстафий Дашкович , Ukrainian: Остап Дашкевич ; born in Ovruch – died after 1535) is considered to be the first recorded leader of a Cossack defense force (according to Dmitri Bantysh-Kamensky, Dmytro Doroshenko, and others).
 However that claim of "first" is debatable because there were many other early leaders, including Bohdan Glinski from Severia.
Grand Theft Parsons is a 2003 film based on the true story of country rock musician Gram Parsons (played by Gabriel Macht), who died of an overdose in 1973.
 Parsons and his road manager, Phil Kaufman (Johnny Knoxville), made a pact in life that whoever died first would be cremated by the other in what was then the Joshua Tree National Monument, an area of desert they both loved and cherished.
Jakow Trachtenberg (17 June 1888 – 1953) was a Jewish mathematician who developed the mental calculation techniques called the Trachtenberg system.
Dmitri Victorovich Anosov (Russian: Дми́трий Ви́кторович Ано́сов ; November 30, 1936 – August 5, 2014) was a Soviet and Russian mathematician, known for his contributions to dynamical systems theory.
The Trachtenberg system is a system of rapid mental calculation.
 The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly.
 It was developed by the Russian Jewish engineer Jakow Trachtenberg in order to keep his mind occupied while being held in a Nazi concentration camp.
Ninan Cuyochi (1490–1527) the oldest son of Sapa Inca Huayna Capac and was first in line to inherit the Inca Empire; however, he died of smallpox shortly before or after his father's death, bringing about aConflicting factions and the fact that the Spanish chroniclers' accounts stemmed from the winners of the ensuing civil war led to conflicting versions of what actually happened.
 Thus, although Huayna Capac named the infant Ninan Cuyochi as his first heir, sources differ as to whether the boy died first, was unacceptable because of an unfavorable divination, or even if Huayna simply forgot that he had named him when asked to confirm the nomination.
 In any event a second choice was requested and again sources vary.
 He may have named Huáscar half-brother Atahualpa who then refused, or named Huáscar himself, or perhaps even the nobles put forward Huáscar.
 Whatever the truth, the result of Huáscar's accession and the dispute over it before and after led to civil war between Huáscar (made Emperor by a faction based in Cuzco) and Atahualpa (backed by leaders who were based in the north with Huayna).
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Dmitri Ivanovich (Russian: Дмитрий Иванович ; 11 October 155226 June 1553) was the first Tsarevich or Tsesarevich - the heir apparent - of the Tsardom of Russia, as the eldest son of Ivan the Terrible, or "Ivan IV of Russia" and his first Tsaritsa, Anastasia Romanovna.
 He was the third child and first son of the couple and died in infancy.
Dmitri Shostakovich's String Quartet No. 7 in F-sharp minor (Op. 108) was composed in February and March 1960 in memory of his first wife Nina Vassilyevna Varzar, who died in December 1954.
 It was premiered in Leningrad by the Beethoven Quartet on 15 May 1960.
 It consists of three movements, performed without a break: