Question: Which author was from Russia, Michael Crichton or Marina Tsvetaeva?

full_context: Document 1: Micro (novel): Micro is a techno-thriller novel by Michael Crichton, published posthumously in 2011. Upon his death in 2008, an untitled, unfinished manuscript was found on his computer, which would become "Micro" and complete his two-book deal with publisher HarperCollins. HarperCollins chose science writer Richard Preston to complete the novel from Crichton's remaining notes and research, and it was finally published in 2011. "Micro" is Crichton's second posthumous novel; "Pirate Latitudes", a historical thriller, was also found on his computer and published posthumously in 2009.
Document 2: Anna Timiryova: Anna Vasilyevna Timiryova (Russian: Анна Васильевна Тимирёва ; July 18, 1893 Kislovodsk - January 31, 1975 Moscow) was a Russian poet. Born Anna Safonova, she was the daughter of composer Vasily Ilyich Safonov. At age 19 she married admiral Sergey Nikolayevich Timiryov, whom she divorced in 1918 to join her lover, Admiral Alexander Kolchak. After Kolchak's execution, she was arrested several times. In 1923 she married Vsevolod Kniper. She was the mother of the painter Vladimir Sergeyevich Timiryov
Document 3: Mirra Lokhvitskaya: Mirra Lokhvitskaya (Russian: Ми́рра Ло́хвицкая ; born Maria Alexandrovna Lokhvitskaya – Russian: Мари́я Алекса́ндровна Ло́хвицкая ; November 19, 1869 – August 27, 1905) was a Russian poet who rose to fame in the late 1890s. In her short lifetime Lokhvitskaya published five books of poetry, the first and the last of which received the most coveted Russian literary award of the day, the Pushkin Prize. Due to the flamboyantly erotic sensuality of her works, Lokhvitskaya was regarded as the "Russian Sappho" by her contemporaries, which did not correspond with her conservative life style of dedicated wife and mother of five sons. Forgotten in Soviet times, in the late 20th century Lokhvitskaya's legacy was reassessed and she came to be regarded as one of the most original and influential voices of the Silver Age of Russian Poetry and the first in the line of modern Russian women poets who paved the way for Anna Akhmatova and Marina Tsvetaeva.
Document 4: Requiem (Anna Akhmatova): Requiem is an elegy written over three decades, between 1935 and 1961 by Anna Akhmatova. Akhmatova composed, worked and reworked the long sequence in secret, depicting the suffering of the common people under the Stalinist Terror. She carried it with her, redrafting, as she worked and lived in towns and cities across the Soviet Union. It was conspicuously absent from her collected works, given its explicit condemnation of the purges. The work in Russian finally appeared in book form in Munich in 1963, the whole work not published within the USSR until 1987. It would become her best known work.
Document 5: Marina Tsvetaeva: Marina Ivanovna Tsvetaeva (Russian: Мари́на Ива́новна Цвета́ева ; ] ; 8 October [O.S. 26 September] 1892 31 August 1941) was a Russian and Soviet poet. Her work is considered among some of the greatest in twentieth century Russian literature. She lived through and wrote of the Russian Revolution of 1917 and the Moscow famine that followed it. In an attempt to save her daughter Irina from starvation, she placed her in a state orphanage in 1919, where she died of hunger. Tsvetaeva left Russia in 1922 and lived with her family in increasing poverty in Paris, Berlin and Prague before returning to Moscow in 1939. Her husband Sergei Efron and her daughter Ariadna Efron (Alya) were arrested on espionage charges in 1941; and her husband was executed. Tsvetaeva committed suicide in 1941. As a lyrical poet, her passion and daring linguistic experimentation mark her as a striking chronicler of her times and the depths of the human condition.
Document 6: Anna Akhmatova: Anna Andreyevna Gorenko (23 June [O.S. 11 June] 1889 – 5 March 1966), better known by the pen name Anna Akhmatova ( ; Russian: Анна Ахматова , ] ), was a Russian modernist poet, one of the most acclaimed writers in the Russian canon.
Document 7: Michael Crichton: John Michael Crichton ( ; October 23, 1942 – November 4, 2008) was an American best-selling author, screenwriter, film director and producer best known for his work in the science fiction, medical fiction and thriller genres. His books have sold over 200 million copies worldwide, and many have been adapted into films.
Document 8: Jurassic Park (novel): Jurassic Park is a 1990 science fiction novel written by Michael Crichton, divided into seven sections (iterations). A cautionary tale about genetic engineering, it presents the collapse of an amusement park showcasing genetically recreated dinosaurs to illustrate the mathematical concept of chaos theory and its real world implications. A sequel titled "The Lost World", also written by Crichton, was published in 1995. In 1997, both novels were re-published as a single book titled "Michael Crichton's Jurassic World", unrelated to the film of the same name.
Document 9: Sergei Efron: Sergei Yakovlevich Efron (Russian: Серге́й Я́ковлевич Эфро́н; 8 October 1893 – 16 October 1941), nicknamed Seryozha, was a Russian poet, officer of White Army and husband of Marina Tsvetaeva. While in emigration, he was recruited by the Soviet NKVD. After returning to USSR from France, he was executed.
Document 10: The Andromeda Strain: The Andromeda Strain is a 1969 techno-thriller novel by Michael Crichton documenting the efforts of a team of scientists investigating the outbreak of a deadly extraterrestrial microorganism in Arizona. "The Andromeda Strain" appeared in the "New York Times" Best Seller list, establishing Michael Crichton as a genre writer.
Document 11: Stephen King: Stephen Edwin King (born September 21, 1947) is an American author of horror, supernatural fiction, suspense, science fiction, and fantasy. His books have sold more than 350 million copies, many of which have been adapted into feature films, miniseries, television series, and comic books. King has published 54 novels, including seven under the pen name Richard Bachman, and six non-fiction books. He has written nearly 200 short stories, most of which have been collected in book collections. Many of his stories are set in his home state of Maine. His novella "Rita Hayworth and Shawshank Redemption" was the basis for the film "The Shawshank Redemption" which is widely regarded as one of the greatest films of all time.
Document 12: Marie Vorobieff: Marie Bronislava Vorobyeva-Stebelska (Russian: Мария Брониславовна Воробьёва-Стебельская ; 1892 – 4 May 1984), also known as Marevna, was a 20th century, Russian-born painter known for her work with Cubism and Pointillism. She is internationally known for convincingly combining elements of cubism (called by her "Dimensionalism") with pointillism and – through the use of the Golden Ratio for laying out paintings – structure. She tends to be accredited with having been the first female cubist painter. Though having lived the greater part of her life abroad – her formative years as a cubist painter in France and her mature years in England –, she is often referred to as a "Russian painter". From her relationship with the Mexican cubist painter and later muralist Diego Rivera in Paris she had a daughter, Marika Rivera (1919-2010), who herself went on to become a professional dancer and film actress.
Document 13: Binary (novel): Binary is a techno-thriller novel written by Michael Crichton in 1972 under the pen-name John Lange. Crichton also directed "Pursuit", a television film version. The story of both the book and the film revolve around a deadly nerve agent composed by combining two different chemicals. Hard Case Crime republished the novel under Crichton's name in 2013.
Document 14: Larisa Novoseltseva: Larisa Novoseltseva (Russian: Лариса Новосельцева ) is a Russian singer-songwriter, composer, performer of Russian and Ukrainian folk songs and romances, and creator of project "Return of the Silver Age". She is author of music and performer of songs and ballads on poems by more than forty Russian poets, mostly of the Silver Age, such as Osip Mandelstam, Nikolay Gumilev, Boris Pasternak,Marina Tsvetaeva, Maksimilian Voloshin, Konstantin Balmont, Alexander Vertinsky and many others, including Bella Akhmadulina who, according to Novoseltseva, can be viewed as the last poet of Silver Age based on her poetic language and style. Novoseltseva created more than 300 songs and published more than 20 music albums. She usually performs solo using guitar or piano for the accompaniment. More recently, she frequently appears with violinist Michael Czerwinski
Document 15: Travels (book): Travels (published in 1988) is a nonfiction book by Michael Crichton that details Crichton's attempts to leave his medical education at Harvard Medical School, followed by his subsequent travel to Los Angeles and adventures continuing his professional writing career, beginning with "The Great Train Robbery" (1975). After his initial book became a movie starring Sean Connery, Crichton describes his adventures over the world, and ultimately his experience with mysticism, including out-of-body experiences, astral projection, and fortune-telling.
ground_truth: Marina Ivanovna Tsvetaeva