Question: When was the first solo art exhibition of the author of the book Comet in Moominland ? 

full_context: Document 1: Miffy: Miffy (Dutch: "Nijntje" , pronounced ] ) is a small female rabbit in a series of picture books drawn and written by Dutch artist Dick Bruna. The original Dutch name, Nijntje, is a shortening of the diminutive "konijntje", "little rabbit".
Document 2: Axel Törneman: Johan Axel Gustaf Törneman (28 October 1880 – 26 December 1925) was one of Sweden's earliest modernist painters. Born in Persberg, Värmland, in Sweden, he grew to work in several modernist styles, was one of the first Swedish expressionist artists, and became a part of the international avant-garde in art after embracing more abstract art styles in Germany and France that were evolving there during the early 1900s. He created his most famous paintings, "Night Café I" and "II", and "Trait", in France in 1905. These night café paintings, made from studies in the Place Pigalle, and in other nightclubs popular with artists such as "Café du Rat Mort" (Dead Rat Café), are seen as two of Swedish modernism's most important works, and are considered breakthrough work of Swedish modernism.
Document 3: Moominpappa at Sea: Moominpappa at Sea (Swedish: "Pappan och havet", literally "The father and the sea") is the seventh book in the Moomin books by Finnish author Tove Jansson. It is based primarily around the character of Moominpappa. It was first published in 1965. "Moominpappa at Sea" forms the basis of episodes 25 and 26 in the 1990 TV series. The original title is a loose reference to Hemingway novel "The Old Man and the Sea", though this is not reflected in the translation.
Document 4: Tove Jansson: Tove Marika Jansson (] ; 9 August 1914 – 27 June 2001) was a Swedish-speaking Finnish novelist, painter, illustrator and comic strip author. Brought up by artistic parents, Jansson studied art from 1930 to 1938 in Stockholm, Helsinki and then Paris. Her first solo art exhibition was in 1943. At the same time, she was writing short stories and articles for publication, as well as creating the graphics for book covers and other purposes. She continued to work as an artist for the rest of her life, alongside her writing.
Document 5: Moomin (1990 TV series): Moomin (Japanese: 楽しいムーミン一家 , Hepburn: Tanoshii Mūmin Ikka , "Delightful Moomin Family") is a Japanese-Finnish-Dutch anime television series produced by Telecable Benelux B.V.. Based on the "Moomin" novels and comic strips by the Finnish illustrator and author Tove Jansson and her brother Lars Jansson, it was the third anime adaptation of the property and the first to receive distribution in other countries worldwide. "Moomin" first aired on TV Tokyo from April 12, 1990 to October 3, 1991. The series has also been dubbed English and aired on CBBC in United Kingdom during the same year.
Document 6: Moominvalley in November: Moominvalley in November (Swedish: "Sent i november", 'Late in November'; Finnish: "Muumilaakson marraskuu") is the ninth and final book in the Moomin series by Finnish author Tove Jansson, and was first published in both her native Swedish and English in 1971. Set contemporaneously with her previous novel "Moominpappa at Sea" (1965), it is the only installment in the series where the titular Moomin family are actually absent. Instead it focuses on a set of other characters, including Snufkin, who come to live at Moominhouse during the onset of winter whilst its inhabitants are away, and the various interactions which they have with each other.
Document 7: Pippi Goes on Board (book): Pippi Goes on Board is a 1946 sequel to Astrid Lindgren's classic children's chapter book, "Pippi Longstocking". It was followed by a further sequel "Pippi in the South Seas". It was filmed in 1969 for a TV series and edited into a film in 1969.
Document 8: 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 9: Karlsson-on-the-Roof: Karlsson-on-the-Roof (Swedish: "Karlsson på taket") is a character who figures in a series of children's books by the Swedish author Astrid Lindgren. A cartoon adaptation of the series became popular in the Soviet Union when it was released in the 1970s. These adaptations are still celebrated to this day as an integral part of the Russian cartoon industry. Karlsson, together with Cheburashka and other such characters, are recognized as a national icon. Lindgren may have borrowed the idea for the series from a similar story about Mr. O'Malley in the comic strip "Barnaby" (1942) by Crockett Johnson.
Document 10: Astrid Lindgren: Astrid Anna Emilia Lindgren (born Ericsson; ] ; 14 November 1907 – 28 January 2002) was a Swedish writer of fiction and screenplays. She is best known for children's book series featuring Pippi Longstocking, Emil i Lönneberga, Karlsson-on-the-Roof, and the Six Bullerby Children ("Children of Noisy Village" in the US), as well as the children's fantasy novels "Mio, My Son", "Ronia the Robber's Daughter", and "The Brothers Lionheart".
Document 11: Selma Lagerlöf: Selma Ottilia Lovisa Lagerlöf (] ; 20 November 1858 – 16 March 1940) was a Swedish author and teacher. She was the first female writer to win the Nobel Prize in Literature.
Document 12: Moomins and the Comet Chase: Moomins and the Comet Chase is a 2010 3D stop motion animated fantasy adventure comedy family film compiled from the "Comet in Moominland"-based episodes of the 1977–1982 "The Moomins" TV series animated at Se-ma-for in Poland, restored and re-soundtracked with multiple voice actors replacing the single narrator. It is the second such Moomin film produced by Finnish children's film company Filmkompaniet, the first being "Moomin and Midsummer Madness", and the first one converted to stereoscopic 3-D. A similar revision of the remainder of the series for high-definition television of all 78 episodes will follow and is currently in production. The same novel has been adapted into film at least twice before, with the 1978 Russian stop motion serial "Mumi-troll" and the 1992 Japanese traditional animation feature "Comet in Moominland". The international version of the film features the voices of known Swedish actors like Stellan Skarsgård, Peter Stormare, Alexander Skarsgård. Musician and Moomins fan Björk also wrote an original song for the film. The international film debuted at the Cannes Film Festival in May 2010. In Finland, it arrived in movie theaters on 6 August 2010 and was later broadcast on the MTV3 channel. The film was also produced in dozens of other languages and subsequently received global distribution.
Document 13: Sue Prideaux: Sue Prideaux is an English novelist and biographer. She has strong links to Norway and her godmother was painted by Edvard Munch, whose biography she later wrote under the title "Edvard Munch: Behind the Scream". Prior to taking up writing she trained as an art historian in Florence, Paris, and London.
Document 14: Comet in Moominland: Comet in Moominland (Swedish: "Kometjakten" / "Mumintrollet på kometjakt" / "Kometen kommer") is the second in Tove Jansson's series of Moomin books. Published in 1946, it marks the first appearance of several main characters, like Snufkin and the Snork Maiden.
Document 15: Susan Vreeland: Susan Joyce Vreeland (January 20, 1946 – August 23, 2017) was an American author. Several of her books deal with the relationship between art and fiction. "The Passion of Artemisia" is a fictionalised investigation of some aspects of the life of Artemisia Gentileschi, while "The Girl in Hyacinth Blue" centres round an imaginary painting by Vermeer. "The Forest Lover" is a fictionalized account of the life of the Canadian painter Emily Carr.
ground_truth: 1943