Question: Which author was also an activist, Jonathan Kellerman or Alan Paton? 

full_context: Document 1: Jonathan Kellerman: Jonathan Kellerman (born August 9, 1949) is an American psychologist, and Edgar and Anthony Award-winning author of numerous bestselling suspense novels.
Document 2: Bryce Courtenay: Bryce Courtenay, AM (14 August 193322 November 2012) was a South African/Australian advertising director and novelist. He is one of Australia's best-selling authors, notable for his book "The Power of One".
Document 3: Alan Paton: Alan Stewart Paton (11 January 1903 – 12 April 1988) was a South African author and anti-apartheid activist. His works include the novels "Cry, the Beloved Country" and "Too Late the Phalarope".
Document 4: Ah, But Your Land Is Beautiful: Ah, But Your Land is Beautiful is the third novel of Alan Paton, the South African author who is best known for writing "Cry, the Beloved Country". "Ah, but Your Land is Beautiful" is an anti-apartheid novel, in a similar vein to "Cry, the Beloved Country". It is a fictional reworking of Paton's own years working as a political activist and of the experience he gained working as the president of the South African Liberal Party.
Document 5: Jesse Kellerman: Jesse Oren Kellerman (born September 1, 1978) is an American novelist and playwright. He has published the novels: "Sunstroke" (2006), "Trouble" (2007), "The Genius" (2008), "The Executor" (2010), "I'll Catch You" (2012), and with his father, Jonathan Kellerman, "The Golem of Hollywood" (2014). For his play, "Things Beyond Our Control" (2004) he was honored with a Princess Grace Award, which recognizes emerging talent in theater, dance, and film in the U.S.
Document 6: Alex Delaware: Alex Delaware is a literary character created by Jonathan Kellerman. The Alex Delaware detective series begins with "When the Bough Breaks", published in 1985. Delaware appears in 32 of Kellerman's popular murder mysteries. Kellerman sets the series in Los Angeles. Delaware is a forensic psychologist; although Kellerman writes a back story in which Delaware practiced as a child psychologist.
Document 7: Alan Sillitoe: Alan Sillitoe (4 March 192825 April 2010) was an English writer and one of the so-called "angry young men" of the 1950s. He disliked the label, as did most of the other writers to whom it was applied. He is best known for his debut novel "Saturday Night and Sunday Morning" and early short story "The Loneliness of the Long Distance Runner", both of which were adapted into films.
Document 8: Peter Dreyer: Peter Richard Dreyer (born November 15, 1939) is the author of "A Beast in View" (London: André Deutsch), "The Future of Treason" (New York: Ballantine), "A Gardener Touched with Genius: The Life of Luther Burbank" (New York: Coward, McCann & Geoghegan; rev. ed., Berkeley: University of California Press; new, expanded ed., Santa Rosa, CA: Luther Burbank Home & Gardens), and "Martyrs and Fanatics: South Africa and Human Destiny" (New York: Simon & Schuster; London: Secker & Warburg). He was born and brought up in South Africa, where he was involved in the anti-apartheid struggle, serving on the Cape Provincial Committee of the Liberal Party, founded and led by Alan Paton, and as secretary of the Western Province Press Association, which published the fortnightly "The Citizen" (not to be confused with the pro-apartheid tabloid of the same name launched in 1976), which introduced the concept of nonracial democracy in South Africa. At the time, the Liberal Party was the only unsegregated political party in South Africa. The African National Congress (ANC) restricted its membership to black Africans (excluding not only "whites" but "Coloured" and Indian South Africans too), and did not desegregate itself until many years later. Dreyer put forward the idea of nonracialism in a pamphlet titled "Against Racial Status and Social Segregation" (Claremont, Cape Town, 1958; now very rare, but to be found in the Bodleian Library at Oxford University and the Hoover Library at Stanford University). The Citizen Group also worked to establish nonracial trade unions, resistance to bus apartheid in Cape Town, and a nonracial theater project, which led to a production of Jean Genet's "The Blacks". On February 8, 1958, Patrick Duncan launched the Liberal Party fortnightly "Contact", with offices on Parliament Street in Cape Town. Dreyer worked closely with Duncan, and in "Contact", 1, no. 15, dated August 23, 1958, he published an article about the newly formed nonracial South African Meat Workers Union under the by-line “Contact Special Correspondent.” On the cover of the magazine, Duncan placed the Citizen group slogan “Forward to a South African patriotism based on non-racial democracy”—the first prominent demand for a nonracial answer to apartheid.
Document 9: Blood Test (novel): Blood Test is the second novel by Jonathan Kellerman, published in 1986. It is told from the first-person point of view of Dr. Alex Delaware, a child psychologist who is Kellerman's main character in the majority of his novels. The novel also includes Delaware's best friend, LAPD Detective, Milo Sturgis.
Document 10: July's People: July's People is a 1981 novel by the South African writer Nadine Gordimer. It is set in a near future version of South Africa where Apartheid is ended through a civil war. Gordimer wrote the book before the end of apartheid as her prediction of how it would end. The book was notably banned in South Africa after its publication, and later under the post-Apartheid government.
Document 11: 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 12: Survival of the Fittest (novel): Survival of the Fittest is the thirteenth novel by Jonathan Kellerman and is told through the first person point of view of Kellerman's main character, Dr. Alex Delaware. LAPD Detective Milo Sturgis has asked Alex to help him with another whodunit. It reached number two in the New York Times Best Seller list for paperbacks.
Document 13: Dean Koontz: Dean Ray Koontz (born July 9, 1945) is an American author. His novels are broadly described as suspense thrillers, but also frequently incorporate elements of horror, fantasy, science fiction, mystery, and satire. Many of his books have appeared on "The New York Times" Bestseller List, with 14 hardcovers and 14 paperbacks reaching the number-one position. Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols", and "Brian Coffey".
Document 14: Pat Conroy: Donald Patrick "Pat" Conroy (October 26, 1945 – March 4, 2016) was an American author who wrote several acclaimed novels and memoirs. Two of his novels, "The Prince of Tides" and "The Great Santini", were made into Oscar-nominated films. He is recognized as a leading figure of late-20th century Southern literature.
Document 15: Saul Kassin: Saul Kassin is a Distinguished Professor of Psychology at John Jay College of Criminal Justice in New York City. and Massachusetts Professor of Psychology at Williams College in Williamstown, Massachusetts.
ground_truth: Alan Stewart Paton