Question: What nationality was the author of The Emperor of Portugallia?

full_context: Document 1: The World of Yesterday: The World of Yesterday: Memories of a European (German title Die Welt von Gestern: Erinnerungen eines Europäers) is the memoir of Austrian writer Stefan Zweig. It is considered the most famous book on the Habsburg Empire. He started writing it in 1934 when, anticipating Anschluss and Nazi persecution, he uprooted himself from Austria to England and later to Brazil. He posted the manuscript, typed by his second wife Lotte Altmann, to the publisher the day before they both committed suicide in February 1942. The book was first published in Stockholm (1942), as "Die Welt von Gestern". It was first published in English in April 1943 by Viking Press. In 2011, Plunkett Lake Press reissued it in eBook form.
Document 2: The King of Elfland's Daughter: The King of Elfland's Daughter is a 1924 fantasy novel by British writer Lord Dunsany. It is widely recognized as one of the most influential and acclaimed works in all of fantasy literature. Although the novel faded into relative obscurity following its initial release, it found new longevity and wider critical acclaim when a paperback edition was released in 1969 as the second volume of the "Ballantine Adult Fantasy series". It has also been included in a more recent series of books reprinting the best of modern fantasy, the Fantasy Masterworks series. While seen as highly influential upon the genre as a whole, the novel was particularly formative in the (later-named) subgenres of fairytale fantasy and high fantasy.
Document 3: 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 4: 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 5: Charlotte Löwensköld: Charlotte Löwensköld is an 1925 novel by the Swedish writer Selma Lagerlöf. It is the second installment in Lagerlöf's Ring trilogy; it was preceded by "The Löwensköld Ring" and followed by "Anna Svärd". The novel was adapted into a film of the same title in 1930 and again in 1979 starring Ingrid Janbell.
Document 6: Nobel Prize in Literature: Since 1901, the Nobel Prize in Literature (Swedish: "Nobelpriset i litteratur" ) has been awarded annually to an author from any country who has, in the words of the will of Alfred Nobel, produced "in the field of literature the most outstanding work in an ideal direction" (original Swedish: "den som inom litteraturen har producerat det mest framstående verket i en idealisk riktning"). Though individual works are sometimes cited as being particularly noteworthy, here "work" refers to an author's work as a whole. The Swedish Academy decides who, if anyone, will receive the prize in any given year. The academy announces the name of the chosen laureate in early October. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895; the others are the Nobel Prize in Chemistry, Nobel Prize in Physics, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine.
Document 7: The Emperor of Portugallia: The Emperor of Portugallia (Swedish: Kejsarn av Portugallien) is a novel by Nobel-laureate Selma Lagerlöf, published in 1914 with drawings by Albert Engström. Lagerlöf called it a "Swedish King Lear". The novel was a success with critics and readers, newspaper reviewers said the novel was at the same level as Lagerlöf's earlier novels "Gösta Berling's Saga" and the first part of "Jerusalem". It has been filmed three times: 1925, 1944 and 1992. An English translation by Velma Swanston Howard was published in 1916.
Document 8: The Collected Essays and Occasional Writings of Katherine Anne Porter: The Collected Essays and Occasional Writings of Katherine Anne Porter
Document 9: Barbro Lindgren: Barbro Lindgren (born 18 March 1937) is a Swedish writer of children's books and books for adult readers. For her lasting contribution as a children's writer, Lindgren was a finalist for the biennial, international Hans Christian Andersen Award in 2004. Ten years later she won the annual Astrid Lindgren Memorial Award. The biggest cash prize in children's and young-adult literature, it rewards a writer, illustrator, oral storyteller, or reading promoter for its entire body of work.
Document 10: The Saga of Gosta Berling: The Saga of Gosta Berling (Swedish: Gösta Berlings saga ) is a 1924 Swedish romantic drama film directed by Mauritz Stiller and released by AB Svensk Filmindustri, starring Lars Hanson, Gerda Lundequist and Greta Garbo in her native break-out role on film. The film is based on the 1891 debut novel of the same name by the Swedish author and Nobel Prize winner Selma Lagerlöf. It is also known as Gosta Berling's Saga, The Story of Gosta Berling and The Atonement of Gosta Berling.
Document 11: Emperor and Galilean: Emperor and Galilean (in Norwegian: "Kejser og Galilæer" ) is a play written by Henrik Ibsen. Although it is one of the writer's lesser known plays, on several occasions Henrik Ibsen called "Emperor and Galilean" his major work. "Emperor and Galilean" is written in two complementary parts with five acts in each part and is Ibsen's longest play.
Document 12: Nadine Gordimer: Nadine Gordimer (20 November 1923 – 13 July 2014) was a South African writer, political activist and recipient of the 1991 Nobel Prize in Literature. She was recognized as a woman "who through her magnificent epic writing has – in the words of Alfred Nobel – been of very great benefit to humanity".
Document 13: List of Nobel laureates in Literature: The Nobel Prize in Literature (Swedish: "Nobelpriset i litteratur") is awarded annually by the Swedish Academy to authors for outstanding contributions in the field of literature. It is one of the five Nobel Prizes established by the 1895 will of Alfred Nobel, which are awarded for outstanding contributions in chemistry, physics, literature, peace, and physiology or medicine. As dictated by Nobel's will, the award is administered by the Nobel Foundation and awarded by a committee that consists of five members elected by the Swedish Academy. The first Nobel Prize in Literature was awarded in 1901 to Sully Prudhomme of France. Each recipient receives a medal, a diploma and a monetary award prize that has varied throughout the years. In 1901, Prudhomme received 150,782 SEK, which is equivalent to 7,731,004 SEK in December 2007. The award is presented in Stockholm at an annual ceremony on December 10, the anniversary of Nobel's death.
Document 14: My Name Is Red: My Name Is Red (Turkish: "Benim Adım Kırmızı" ) is a 1998 Turkish novel by writer Orhan Pamuk translated into English by Erdağ Göknar in 2001. Pamuk would later receive the 2006 Nobel Prize in Literature. The novel, concerning miniaturists in the Ottoman Empire of 1591, established Pamuk's international reputation and contributed to his Nobel Prize. The influences of Joyce, Kafka, Mann, Nabokov and Proust and above all Eco can be seen in Pamuk's work.
Document 15: The Tower of Lies: The Tower of Lies (1925) was an American silent drama film directed by Victor Sjöström based upon Selma Lagerlöf's novel "The Emperor of Portugallia" (1914). Released one year after "He Who Gets Slapped", the film marks the second collaboration between Sjöström, Lon Chaney and Norma Shearer. Also starring are William Haines, Ian Keith and Lew Cody.
ground_truth: Swedish