Question: Who proclaimed that the author of the play "The Twelve Months" was the founder of Russia's children's literature?

full_context: Document 1: Samuil Marshak: Samuil Yakovlevich Marshak (alternative spelling: Samuil Yakovlevich Marchak) (; 3 November [O.S. 22 October] 1887 4 July 1964) was a Russian Jewish and Soviet writer, translator and children's poet. He translated the sonnets and some other of the works of William Shakespeare, English poetry (including poems for children), and poetry from other languages. Maxim Gorky proclaimed Marshak to be "the founder of Russia's (Soviet) children's literature."
Document 2: The Seasons (Tchaikovsky): The Seasons, Op. 37a (also seen as Op. 37b; Russian: Времена года ; published with the French title Les Saisons), is a set of twelve short character pieces for solo piano by the Russian composer Pyotr Ilyich Tchaikovsky. Each piece is the characteristic of a different month of the year in the northern hemisphere. The work is also sometimes heard in orchestral and other arrangements by other hands. Individual excerpts have always been popular – "Troika" (November) was a favourite encore of Sergei Rachmaninoff, and "Barcarolle" (June) was enormously popular and appeared in numerous arrangements (for orchestra, violin, cello, clarinet, harmonium, guitar and even mandolin).
Document 3: Sonnet 11: Sonnet 11 is one of 154 sonnets written by the English playwright and poet William Shakespeare. It is a procreation sonnet within the 126 sonnets of the Fair Youth sequence, a grouping of Shakespeare's sonnets addressed to an unknown young man. While the order in which the sonnets were composed is undetermined (though it is mostly agreed that they were not written in the order in which modern readers know them), Sonnet 11 was first published in a collection, the Quarto, alongside Shakespeare's other sonnets in 1609.
Document 4: Iosif Boyarsky: Iosif Yakovlevich Boyarsky (November 7, 1917 – March 12, 2008) was a Russian animator and director, the longtime Director of the Model Animation Association of Soyuzmultfilm Studio, an award-winning Russian animation studio based in Moscow.
Document 5: Sonnet 102: Sonnet 102 is one of the 154 sonnets written by English playwright and poet William Shakespeare. It is one of the Fair Youth sonnets, in which Shakespeare writes of an unnamed youth with whom the poet is enamored. Sonnet 102 is among a series of seemingly connected sonnets, from Sonnet 100 to Sonnet 103, in which the poet speaks of a silence between his Muse and himself. The exact date of writing is unknown, and there is contention among scholars about when they were written. Paul Hammond among other scholars believes that sonnets 61-103 were written primarily during the early 1590s, and then being edited or added to later, during the early 1600s (decade). Regardless of date of writing, it was published later along with the rest of the sonnets of the 1609 Quarto.
Document 6: William Shakespeare: William Shakespeare ( ; 26 April 1564 (baptised) – 23 April 1616) was an English poet, playwright, and actor, widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet, and the "Bard of Avon". His extant works, including collaborations, consist of approximately 38 plays, 154 sonnets, two long narrative poems, and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright.
Document 7: Sonnet 154: As the last in the famed collection of sonnets written by English poet and playwright William Shakespeare from 1592 to 1598, Sonnet 154 is most often thought of in a pair with the previous sonnet, number 153. As A. L. Rowse states in "Shakespeare's Sonnets: The Problems Solved", Sonnets 153 and 154 "are not unsuitably placed as a kind of coda to the Dark Lady Sonnets, to which they relate." Rowse calls attention to the fact that Sonnets 153 and 154 "serve quite well to round off the affair Shakespeare had with Emilia, the woman characterized as the Dark Lady, and the section of the Dark Lady sonnets". Shakespeare used Greek mythology to address love and despair in relationships. The material in Sonnets 153 and 154 has been shown to relate to the six-line epigram by the Byzantine poet known as Marianus Scholasticus, who published a collection of 3,500 poems called "The Greek Anthology". When translated, the epigram resembles Sonnets 153 and 154, addressing love and the story of Cupid, the torch, and the Nymph's attempt to extinguish the torch.
Document 8: 12 (2007 film): 12 is a 2007 crime film by Russian director and actor Nikita Mikhalkov. Mikhalkov was awarded the Special Lion at the 64th Venice International Film Festival for his work on the film, which also received an Academy Award nomination for Best Foreign Language Film. It is an adaptation of Reginald Rose's play "Twelve Angry Men" and a remake of Sidney Lumet's film "12 Angry Men".
Document 9: Sonnet 110: Sonnet 110 is one of 154 sonnets written by the English playwright and poet William Shakespeare. Sonnet 110 was published along with the other sonnets in the 1609 Quarto. The sonnet falls in place with the Fair Youth sequence of Shakespeare's sonnets, in which the poet expresses his love towards a young man. The mystery of the young man is still unknown today. However, there are many different theories by various scholars of who this young man may be. There has been much debate whether or not this sonnet was written about Shakespeare's disdain with the stage and actors. Whereas others have interpreted sonnet 110 as the poet confessing his love to a young man.
Document 10: The Twelve Months (1956 film): The Twelve Months (Russian: Двенадцать месяцев ; "Dvenadtsat mesyatsev") is a 1956 Soviet traditionally animated feature film directed by the "patriarch of Russian animation", Ivan Ivanov-Vano. It was produced at the Soyuzmultfilm studio in Moscow and is based on the fairy-tale play of the same name by Samuil Marshak.
Document 11: Sonnet 6: Sonnet 6 is one of 154 sonnets written by the English playwright and poet William Shakespeare. It is a procreation sonnet within the Fair Youth sequence. The sonnet continues Sonnet 5, thus forming a diptych. It also contains the same distillatory trope featured in Sonnet 54, Sonnet 74 and Sonnet 119.
Document 12: Ivan's Childhood: Ivan's Childhood (Russian: Ива́ново де́тство, "Ivanovo detstvo" ), sometimes released as "My Name Is Ivan" in the US, is a 1962 Soviet war drama film directed by Andrei Tarkovsky and co-written by Mikhail Papava and an uncredited Tarkovsky, based on Vladimir Bogomolov's 1957 short story "Ivan" (Russian: "Иван" ). The film features child actor Nikolai Burlyayev, Valentin Zubkov, Yevgeni Zharikov, Stepan Krylov, Nikolai Grinko, and Tarkovsky's wife Irma Raush.
Document 13: Vaniusha and The Giant: Vaniusha and The Giant (Russian: Ванюша и великан ) is a 1993 Russian stop-motion animation film by Vladimir Danilevich. This film was produced by Soyuzmultfilm studio. <br>The film is about The Friendly Newcomer from another planet.<br> The film is the fourth film of the tetralogy, which tells about the adventures of The Newcomer Vaniusha and his friends. The first three films are "The Newcomer in The Cabbage", "Vaniusha The Newcomer" and "Vaniusha and The Space Pirate".
Document 14: Yuriy Norshteyn: Yuriy Borisovich Norshteyn, PAR (Russian: Ю́рий Бори́сович Норште́йн ), or Yuri Norstein (born 15 September 1941), is a Soviet and Russian animator best known for his animated shorts, "Hedgehog in the Fog" and "Tale of Tales". Since 1981 he has been working on a feature film called "The Overcoat", based on the short story by Nikolai Gogol of the same name. According to the "Washington Post", "He is considered by many to be not just the best animator of his era, but the best of all time".
Document 15: Twelfth Night (1955 film): Twelfth Night (Russian: Двенадцатая ночь , transliteration "Dvenadtsataya noch") is a 1955 Soviet comedy film by Lenfilm based on Shakespeare's play Twelfth Night, or What You Will. Script by Yan Frid. United States release date: March 3, 1956.
ground_truth: Maxim Gorky