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

Context paragraphs:
Spring exhibition (Leningrad, 1954): Spring Fine Art Exhibition of Leningrad artists (Leningrad, 1954) (Russian: ""Весенняя выставка произведений ленинградских художников 1954 года"" ) become one of the largest Soviet Art Exhibition of 1954 and one of the first Art Exhibitions after Stalin death.  The Exhibition took place in Leningrad Union of Soviet Artists Exhibition Halls on Bolshaya Morskaya st. 38.

Teddy Lo: Teddy Lo is a Hong Kong and New York-based LED artist known for his work in the "tech-art" scene.  He has held exhibitions in the United States, Europe, and Asia.  Lo studied advertising design at the Art Center College of Design in Pasadena, California, where he began exploring the use of light-emitting diodes in art; he relocated to New York City after his graduation in 2001.  He began his career in the advertising industry, and at the same time pursue art using LED as his medium In 2003, Lo held his first solo art exhibition, Morphology, in New York City.  He was named in Lighting magazine's "Who's Who of Lighting 2004", for his contribution to the lighting industry.  Since then, Lo has held solo exhibitions in various locations, including Russell Simmons' Art for Life in NYC, Luminale in Frankfurt, the 2006 National Day Singapore Expo at The Esplanade and Microwave's "A-Glow-Glow" outdoor Media Art Exhibition at Hong Kong Museum of Art, Miaimi Art Basel and Burniningman Festival in Nevada.  His work is also featured in “Legacy and Creations – Ink Art vs Ink Art and Art vs Art” at Hong Kong Museum of Art, I Light Marina Bay in Singapore and “Transmutation” in New York.

The Marx Lounge: The Marx Lounge is an art exhibition by the Chilean artist Alfredo Jaar.  It was first presented at the Liverpool Biennial art exhibition in England in 2010 and was later shown at the Biennial again in 2016.  The exhibit has subsequently been presented at the Stedelijk Museum Amsterdam's SMBA space and the Andalusian Center for Contemporary Art (CAAC).  For the exhibition a large space was transformed into a red reading room with sofas, reading lamps and a large reading table on which a large collection of books was installed.

Degenerate Art Exhibition: The Degenerate Art Exhibition (German: "Die Ausstellung "Entartete Kunst"" ) was an art exhibition organized by Adolf Ziegler and the Nazi Party in Munich from 19 July to 30 November 1937.  The exhibition presented 650 works of art, confiscated from German museums, and was staged in counterpoint to the concurrent Great German Art Exhibition.  The day before the exhibition started, Hitler delivered a speech declaring "merciless war" on cultural disintegration, attacking "chatterboxes, dilettantes and art swindlers".  Degenerate art was defined as works that "insult German feeling, or destroy or confuse natural form or simply reveal an absence of adequate manual and artistic skill".  One million people attended the exhibition in its first six weeks.  A U.S. critic commented "there are probably plenty of people—art lovers—in Boston, who will side with Hitler in this particular purge".

Freie Berliner Kunstausstellung: The Freie Berliner Kunstausstellung (FBK), the “Free Berlin Art Exhibition” in Berlin (Germany), was “unique in its structure”.  For 24 years, from 1971 to 1995, it was the only non-juried art exhibition of its size in Europe.  It opened after the "Große Berliner Kunstausstellung", the “Grand Berlin Art Exhibition”, a juried art exhibition, had closed its doors.  Supported by the Senate of Berlin, an association, called the "Freie Berliner Kunstausstellung" was registered in 1970 with the goal to organize annual exhibitions.  Hans-Joachim Zeidler became chairperson of this association for the first four years, followed by Ernst Leonhardt (Artist).  During the association's last four years, Karin Rech took over the leadership.

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.

Star Art Exhibition: The Star Art Exhibition took place on September 27, 1979 when a group of avant-garde and self-taught (not trained in the Academy) Chinese artists staged an unpermitted exhibition on the railings of the China Art Gallery after being denied an official exhibition space.  The group is called Star Art Group(Xingxing) which used formerly banned western style, from Post-impressionism to Abstract Expressionism to challenge both aesthetic convention and political authority: their exhibition was closed by the police and they post a notice on Democracy Walls.  In November, Beihai Park Beijing, the group held their first formal exhibition: Star Art Exhibition (Xingxing huazhan), which includes 163 works by 23 nonprofessional artists.  Star Art exhibition was a milestone in China's contemporary art.

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.

Hong Lei (artist): Hong Lei (; born 1960) is one of the leading artists in the era of China's New Photography movement in the 1990s.  He was born in Changzhou, Jiangsu in 1960 and graduated from Nanjing University of the Arts in 1987.  In 1992, he went to the China Central Academy of Fine Arts to pursue advanced studies in printmaking.  Inspired by his early art experience in Yuan Ming Yuan and learning from traditional Chinese paintings, he returned to Changzhou and soon started to use photography as a way of art representation since 1996.  His renowned works include "Autumn in the Forbidden City" (1997), "Chinese Landscape" (1998), "After Liang Kai's (Song Dynasty) Masterpiece Sakyamuni Coming Out of Retirement" (1998), "I Dreamt that I was Hung Upside Down to Listen to Huizong Play the Zither with Chairman Mao" (2004) and "Nothing to Hide" (2008), among others.  Apart from his success in digital photos, he started to photograph black and white Shan shui landscapes as an ongoing experimental project since 2000 to rethink Chinese traditional aesthetics.  In recent years, he has also explored the various boundaries and possibilities of photography by painting his own photos on silk, as well as video & installation works.  His selected solo and group exhibitions include "Recontres d' Arles: Arles Phototography Festival" (Arles, France, 2003), "Alors, La Chine? , Chinese Contemporary Art Exhibition" (Pompidou Centre, Paris, 2003), "Seven Worthies" (solo exhibition, Beijing, 2007), "Seasons" (solo exhibition, Beijing, New York, 2008), 2011 Chengdu Biennale, "Mi Lou" (solo exhibition, Beijing, 2012) and "Perfume This is Not" (solo exhibition, Shanghai, 2012).  Now he lives and works in Changzhou and Shanghai.

New Painting of Common Objects: The exhibition "New Painting of Common Objects" at the Pasadena Art Museum in 1962 was the first museum survey of American pop art.  The eight artists included were: Roy Lichtenstein, Jim Dine, Andy Warhol, Phillip Hefferton, Robert Dowd, Edward Ruscha, Joe Goode and Wayne Thiebaud.  It was curated by Walter Hopps, who had given Andy Warhol his first solo show at the Ferus Gallery in Los Angeles the previous year.  The show helped the pop art movement gain critical acceptance, preceding the Guggenheim Museum's 1963 pop art exhibition "Six Painters and the Object", curated by Lawrence Alloway.

Supporting paragraphs: Comet in Moominland Tove Jansson
Answer: 1943