Isaac Humala Núñez is a labour lawyer from Ayacucho and the ideological leader of the Movimiento Etnocacerista, a group of ethnic nationalists in Peru.
 He is a former communist leader who served as the model for a colourful character in Peruvian novelist Mario Vargas Llosa's novel "Conversation in the Cathedral."
 He was Vargas Llosa's teacher of Marxism-Leninism when the writer became a member of a university communist cell.
Edith Grossman (born March 22, 1936) is an American Spanish-to-English literary translator.
 She is one of the most important translators of Latin American fiction in the past century, and into the 21st, translating the works of Nobel laureate Mario Vargas Llosa, Nobel laureate Gabriel García Márquez, Mayra Montero, Augusto Monterroso, Jaime Manrique, Julián Ríos, Álvaro Mutis, and of Miguel de Cervantes.
The Time of the Hero (original title: "La ciudad y los perros", literally "The City and the Dogs", 1963) is a 1963 novel by Peruvian writer Mario Vargas Llosa, who won the Nobel Prize in 2010.
 It was Vargas Llosa's first novel and is set among the cadets at the Leoncio Prado Military Academy in Lima, which he attended as a teenager.
 The novel portrays the school so scathingly that its leadership burned a large number of copies and condemned the book as Ecuadorian propaganda against Peru.
Jorge Mario Pedro Vargas Llosa, 1st Marquis of Vargas Llosa (born March 28, 1936), more commonly known as Mario Vargas Llosa ( ; ] ), is a Peruvian writer, politician, journalist, essayist and college professor.
 Vargas Llosa is one of Latin America's most significant novelists and essayists, and one of the leading writers of his generation.
 Some critics consider him to have had a larger international impact and worldwide audience than any other writer of the Latin American Boom.
 In 2010 he won the Nobel Prize in Literature, "for his cartography of structures of power and his trenchant images of the individual's resistance, revolt, and defeat."
Raúl Porras Barrenechea was a Peruvian diplomat, historian and politician.
 He was born in Pisco, Peru on March 23, 1897 and died in Lima, Peru on September 27, 1960.
 He was a teacher at the Anglo-Peruvian School.
 As a student during the 1950s Mario Vargas Llosa worked with Porras for four and one-half years and learned a great deal from him.
 Porras ran unsuccessfully for the rectorate of his "alma mater", the National University of San Marcos, losing to Aurelio Miro Quesada.
 Later he was elected senator representing Lima, and was selected first vice president of the Senate.
 After that, during his second presidency of Peru, Manuel Prado Ugarteche appointed Porras foreign minister.
 Luis Alberto Sanchez wrote the prologue to Porras's posthumous book on Pizarro which was assembled by a number of Porras's followers.
 Since 1991, when the nuevo sol became the official currency of Peru, his portrait is on the S/.
 20 banknote.
William March (September 18, 1893 – May 15, 1954) was an American writer of psychological fiction and a highly decorated US Marine.
 The author of six novels and four short-story collections, March was praised by critics but never attained great popularity.
The Marquisate of Vargas Llosa (Spanish: "Marquesado de Vargas Llosa" ) is a hereditary title in the Spanish nobility.
 The marquisate was bestowed by Juan Carlos I of Spain on the author and Nobel laureate, Mario Vargas Llosa, by Royal Decree 134/2011, on 3 February 2011.
Conversation in the Cathedral (original title: "Conversación en la catedral") is a 1969 novel by Peruvian writer and essayist Mario Vargas Llosa, translated by Gregory Rabassa.
 One of Vargas Llosa's major works, it is a portrayal of Peru under the dictatorship of Manuel A. Odría in the 1950s, and deals with the lives of characters from different social strata.
 The ambitious narrative is built around the stories of Santiago Zavala and Ambrosio respectively; one the son of a minister, the other his chauffeur.
 A random meeting at a dog pound leads to a riveting conversation between the two at a nearby bar known as the Cathedral (hence the title).
 During the encounter Zavala tries to find the truth about his father's role in the murder of a notorious Peruvian underworld figure, shedding light on the workings of a dictatorship along the way.
General elections were held in Peru on 8 April 1990, with a second round of the presidential elections on 10 June.
 The run-off was between favorite, novelist Mario Vargas Llosa leading a coalition of economically liberal parties collectively known as the Democratic Front and political underdog Alberto Fujimori of the populist and more moderate Cambio 90.
 Vargas Llosa won the first round with a fairly low number of the votes, but alienated much of the electorate with a comprehensive privatisation agenda, bolstering the allegedly unelectable Fujimori.
 Fujimori eventually won a landslide victory and would remain president for ten years until he was ousted in 2000.
The Perpetual Orgy: Flaubert and Madame Bovary (Spanish: "La orgía perpetua.
 Flaubert y Madame Bovary" , 1975) is a book-length essay by the Nobel Prize–winning Peruvian novelist Mario Vargas Llosa which examines Flaubert's "Madame Bovary" as the first modern novel.
 The first part of the book has an autobiographical tone; Vargas Llosa then goes on to examine the structure and meaning of "Madame Bovary" as well as its role in the development of the modern novel.
 First published in Spanish in 1975, the book was translated into English in 1986 by Helen Lane.

Question: What were the occupations of Mario Vargas Llosa and William March?
Answer: writer