Question: Who has won more Pulitzer Prizes, Thomas Friedman or Colson Whitehead?

full_context: Document 1: Alice Walker: Alice Malsenior Walker (born February 9, 1944) is an American novelist, short story writer, poet, and activist. She wrote the critically acclaimed novel "The Color Purple" (1982) for which she won the National Book Award and the Pulitzer Prize for Fiction. She also wrote the novels "Meridian" (1976) and "The Third Life of Grange Copeland" (1970), among other works.
Document 2: Sag Harbor (novel): Sag Harbor is a 2009 novel by award-winning author Colson Whitehead.
Document 3: Tom Friedman (artist): Tom Friedman (born 1965) is an American conceptual sculptor. Friedman was born in St. Louis, Missouri. He received his BFA in graphic illustration from Washington University in St. Louis in 1988, and an MFA in sculpture from the University of Illinois at Chicago in 1990. As a conceptual artist he works in a variety of mediums including, sculpture, painting, drawing, video, and installation. For over twenty years Friedman has been investigating the viewer/object relationship, and "the space in between." Friedman has held solo exhibitions at the Museum of Modern Art, New York, Yerba Buena Museum of Art, San Francisco, Magasin 3 in Stockholm, Sweden, The New Museum in New York, the Tel Aviv Art Museum, and others. His work can be found in the museum collections of MoMA, Los Angeles Contemporary Art Museum, the Broad Art Museum, the Solomon Guggenheim Museum, The Metropolitan Museum of Art, Museum of Contemporary Art, Chicago, and the Museum of Contemporary Art, Tokyo. He is currently represented by Luhring Augustine Gallery and Stephen Friedman Gallery. He lives and works in Northampton, Massachusetts.
Document 4: Thomas Friedman: Thomas Loren Friedman (born July 20, 1953) is an American journalist and author. He is a three time Pulitzer Prize winner.
Document 5: Jonathan Franzen: Jonathan Earl Franzen (born August 17, 1959) is an American novelist and essayist. His 2001 novel "The Corrections", a sprawling, satirical family drama, drew widespread critical acclaim, earned Franzen a National Book Award, was a Pulitzer Prize for Fiction finalist, earned a James Tait Black Memorial Prize and was shortlisted for the International IMPAC Dublin Literary Award. His novel "Freedom" (2010) garnered similar praise and led to an appearance on the cover of "Time" magazine alongside the headline "Great American Novelist".
Document 6: Zone One: Zone One is a 2011 "The New York Times" best-selling novel by African American author Colson Whitehead. "Zone One" is part genre fiction, part literary fiction—a zombie story in the hands of a Pulitzer-nominated novelist. Whitehead has stated that the novel was partly an attempt to return to his adolescent fascination with horror writer Stephen King and science fiction icon Isaac Asimov.
Document 7: Hot, Flat, and Crowded: Hot, Flat, and Crowded: Why We Need a Green Revolution—And How It Can Renew America is a book by "New York Times" Foreign Affairs columnist Thomas Friedman, proposing that the solutions to global warming and the best method to regain the United States' economic and political stature in the world are to embrace the clean energy and green technology industries. The title derives from the convergence of Hot (global warming), Flat (globalization, as discussed in Friedman's book "The World Is Flat") and Crowded (population growth).
Document 8: Thomas B. Edsall: Thomas Byrne Edsall (born August 22, 1941) is an American journalist and liberal / progressive academic, currently serving as an adjunct faculty member https://journalism.columbia.edu/faculty/tom-edsall of the Columbia University School of Journalism in New York City. He is best known for his weekly opinion column for The New York Times online and for his 25 years covering national politics for the "Washington Post".
Document 9: Nicholas Kristof: Nicholas Donabet Kristof (born April 27, 1959) is an American journalist. He is the winner of two Pulitzer Prizes. He is a regular CNN contributor, and has written an op-ed column for "The New York Times" since November 2001. According to "The Washington Post", Kristof "rewrote opinion journalism" with his emphasis on human rights abuses and social injustices, such as human trafficking and the Darfur conflict. Archbishop Desmond Tutu of South Africa has described Kristof as an "honorary African" for shining a spotlight on neglected conflicts.
Document 10: Greg Grandin: Greg Grandin (born 1962) is a professor of history at New York University. He is author of a number of books, including "Fordlândia: The Rise and Fall of Henry Ford’s Forgotten Jungle City", which was a finalist for the Pulitzer Prize for History, as well as for the National Book Award and a National Book Critics Circle Award. A more recent book, entitled, "Who Is Rigoberta Menchú?", focuses on the treatment of the Guatemalan Nobel Peace Prize winner. His latest book, "The Empire of Necessity: Slavery, Freedom, and Deception in the New World," is a study of the factual basis for the novella "Benito Cereno" by Herman Melville.
Document 11: Friedman Unit: The Friedman Unit, or simply Friedman, is a tongue-in-cheek neologism. One Friedman Unit is equal to six months, specifically the "next six months", a period repeatedly declared by "New York Times" columnist Thomas Friedman to be the most critical of the then-ongoing Iraq War even though such pronouncements extended back over two and a half years.
Document 12: Tom Reiss: Tom Reiss (born May 5, 1964) is an American author, historian, and journalist. He is the author of three nonfiction books, the latest of which is "" (2012), which received the 2013 Pulitzer Prize for Biography or Autobiography. His previous books are "Führer-Ex: Memoirs of a Former Neo-Nazi" (1996), the first inside exposé of the European neo-Nazi movement; and "The Orientalist: Solving the Mystery of a Strange and Dangerous Life" (2005), which became an international bestseller. As a journalist, Reiss has written for "The New Yorker", "The Wall Street Journal", and "The New York Times".
Document 13: Colson Whitehead: Colson Whitehead (born November 6, 1969) is an American novelist. He is the author of six novels, including his debut work, the 1999 novel "The Intuitionist", and "The Underground Railroad" (2016), for which he won the 2016 National Book Award for Fiction and the 2017 Pulitzer Prize for Fiction. He has also published two books of non-fiction. In 2002, he received a MacArthur Fellowship ("Genius Grant").
Document 14: Mitchell S. Jackson: Mitchell S. Jackson is an American writer based in New York City. He is the author of the 2013 novel "The Residue Years", as well as "Oversoul" (2012), an ebook collection of essays and short stories. Jackson is a Whiting Award recipient and a former winner of the Ernest J. Gaines Award for Literary Excellence He has also been the recipient of fellowships from TED and the Lannan Foundation. Jackson is also a public speaker and documentarian. He serves on the faculties of New York University and Columbia University.
Document 15: All the Pretty Horses (novel): All the Pretty Horses is a novel by American author Cormac McCarthy published by Alfred A. Knopf in 1992. Its romanticism (in contrast to the bleakness of McCarthy's earlier work) brought the writer much public attention. It was a bestseller, and it won both the U.S. National Book Award
ground_truth: Thomas Loren Friedman