Question: Grealeaf is a television series exexutive produced by the queen of what?

full_context: Document 1: Project Greenlight: Project Greenlight was an American documentary television series focusing on first-time filmmakers being given the chance to direct a feature film. It was created by Alex Keledjian, developed by Eli Holzman and produced by Ben Affleck, Matt Damon, Sean Bailey, and Chris Moore through their production company LivePlanet, along with Miramax Films. "Project Greenlight" first aired on HBO for two seasons (aired 2001–03) before moving to Bravo for season three in 2005. The series returned in 2015 for a fourth season airing on HBO. On July 26, 2016, the show was cancelled.
Document 2: The Oprah Winfrey Show: The Oprah Winfrey Show, often referred to simply as Oprah, is an American syndicated tabloid talk show that aired nationally for 25 seasons from September 8, 1986 to May 25, 2011 in Chicago, Illinois. Produced and hosted by its namesake, Oprah Winfrey, it remains the highest-rated daytime talk show in American television history.
Document 3: Oprah Winfrey's endorsement of Barack Obama: Oprah Winfrey's endorsement of Barack Obama was one of the most widely covered and studied developments of the 2008 presidential campaign. Winfrey has been described as for her impact on culture and her proven record as a taste-maker and trend-setter, and there was much interest in whether that influence could translate politically since she had never before endorsed a candidate. Winfrey first endorsed Obama in September 2006 before he had even declared himself a candidate. In May 2007 Winfrey made her first endorsement of candidate Obama, and in December 2007, she made her first campaign appearances for him. Two economists estimate that Winfrey’s endorsement was worth over a million votes in the Democratic primary race and that without it, Obama would have lost the nomination. Then-Governor of Illinois Rod Blagojevich claimed that the endorsement was so significant in electing Obama president that he considered offering Obama's former seat in the Senate to Winfrey.
Document 4: Whoopi Goldberg: Caryn Elaine Johnson (born November 13, 1955), known professionally as Whoopi Goldberg ( ), is an American actress, comedian, author, and television host. She has been nominated for 13 Emmy Awards for her work in television and is one of the few entertainers who have won an Emmy Award, a Grammy Award, an Oscar, and a Tony Award. She was the second black woman in the history of the Academy Awards to win an acting Oscar.
Document 5: Oprah's Lifeclass: Oprah's Lifeclass (also known as Oprah's Lifeclass: The Tour in the show's second season) is an American primetime television show hosted and produced by Oprah Winfrey, which aired on OWN: Oprah Winfrey Network. The series premiered on October 10, 2011.
Document 6: Harpo Productions: Harpo Productions (also referred to as Harpo Studios) is a US-based multimedia production company founded by Oprah Winfrey (the name "Harpo" is "Oprah" spelled backwards, and was the name of her on-screen husband in "The Color Purple") and is the sole subsidiary of her media and entertainment company, Harpo, Inc. Harpo Productions's subsidiaries consist solely of Harpo Print, LLC (the company's publishing house). One of its subsidiaries, Harpo Films (the company's film studio), was shut down in early 2013. Another, Harpo Radio (the company's radio broadcasting division), was shut down January 1, 2015 after satellite radio provider SiriusXM decided not to renew the deal with the radio service. The company also counts in its holdings 50% of the Oprah Winfrey Network (OWN) (the company's joint venture cable network with Discovery Communications). It was based in Chicago, and Harpo Studios (the company's TV production studio and corporate headquarters for Harpo Productions) was located in the Near West Side neighborhood of Chicago until the studios closed in 2015. Harpo Productions and OWN are both currently based in West Hollywood, California.
Document 7: Craig Wright (playwright): Craig Wright (born 1965 in Puerto Rico) is an American playwright, television producer and writer. He is known for writing for shows including "Six Feet Under" and "Lost" and creating the television series "Dirty Sexy Money". He also was the screenwriter for the movie "Mr. Peabody & Sherman", released March 7, 2014.
Document 8: Tye White: Tye White is an American actor. In 2016, he began starring as Kevin Satterlee in the Oprah Winfrey Network drama series, "Greenleaf".
Document 9: Oprah Winfrey: Oprah Winfrey (born Orpah Gail Winfrey; January 29, 1954) is an American media proprietor, talk show host, actress, producer, and philanthropist. She is best known for her talk show "The Oprah Winfrey Show", which was the highest-rated television program of its kind in history and was nationally syndicated from 1986 to 2011 in Chicago, Illinois. Dubbed the "Queen of All Media", she has been ranked the richest African-American, the greatest black philanthropist in American history, and is North America's first multi-billionaire black person. Several assessments rank her as the most influential woman in the world. In 2013, she was awarded the Presidential Medal of Freedom by President Barack Obama and honorary doctorate degrees from Duke and Harvard.
Document 10: Greenleaf (TV series): Greenleaf is an American television drama series, created by Craig Wright, and executive produced by Oprah Winfrey and Lionsgate Television. Clement Virgo also serves as an executive producer and director. It stars Keith David, Lynn Whitfield, and Merle Dandridge. "Greenleaf" premiered on the Oprah Winfrey Network on June 21, 2016.
Document 11: Deborah Joy Winans: Deborah Joy Winans is an American actress and singer, and member of the musical Winans family. She is starring as Charity Greenleaf-Satterlee in the Oprah Winfrey Network drama series, "Greenleaf".
Document 12: Oprah Prime: Oprah Prime (formerly Oprah's Next Chapter) is an American prime-time television show hosted and produced by Oprah Winfrey, airing on Oprah Winfrey Network. The series premiered on January 1, 2012, with a two-part episode featuring Aerosmith frontman Steven Tyler. The third season brought a new series title, "Oprah Prime", and premiered on March 9, 2014.
Document 13: Norm Green: Norm Green (born November 3, 1956 as Norman Green) is an American director and executive producer.
Document 14: David W. Zucker: David W. Zucker is President of Television for Scott Free, and Executive Producer of the landmark series adaptation of Philip K. Dick’s classic “The Man in the High Castle” for Amazon, esteemed Civil War medical drama “Mercy Street” on PBS, the forthcoming first season of the Amazon half-hour action-comedy starring Jean-Claude Van Damme as “Jean-Claude Van Johnson,” the AMC anthological psychological thriller “The Terror,” “The Good Fight," the widely acclaimed CBS all-access spin-off of “The Good Wife,” and “Killing Reagan,” the fourth in the acclaimed National Geographic channel series of “Killing” telefilms (which include “Killing Jesus” and “Killing Kennedy,” both Emmy-nominated, plus the docudrama “Killing Lincoln”). During his tenure, Scott Free has produced a steady stream of highly acclaimed programs including the Emmy and Golden Globe-nominated, Peabody-winning drama, “The Good Wife,” which recently concluded its 7th and final season on CBS, as well as “Numb3rs,” which ran for six successful seasons on the same network. Notable long form programs include “Klondike” for Discovery, the Emmy and Golden Globe-nominated “The Pillars of the Earth” for Starz, “World Without End” for Reelz, Emmy-nominated “Into the Storm” for HBO, Emmy-nominated “The Andromeda Strain” and “Coma” for A&E, the Golden Globe-nominated “The Company” at TNT and a feature-length digital series for X-Box/Microsoft, “Halo: Nightfall.” Acclaimed non-fiction programs include “Crimes of the Century” and the Emmy-winning documentary special “Gettysburg” for History Channel. Previously, Zucker worked as a Story Editor on the CBS series, Judging Amy, wrote pilot scripts for CBS and ABC, as well as various stage plays, and served as VP of Drama Series for CBS in addition to VP of Drama Series & Current Programs at Warner Bros. TV.
Document 15: Sheri Salata: Sheri Salata (born October 20, 1959) is co-president of Oprah Winfrey Network (OWN) and president of Winfrey’s Harpo Productions. She was born in Georgia and raised in Chicago's northern suburbs. She graduated from the University of Iowa in the early 1980s. Salata's first job was assistant to Perry Stebor, an executive at Grey Advertising in Chicago. Salata entered Harpo Studios in 1995 as promotions producer. In 2009 she was named president of Harpo Studios. Salata served as executive producer of "The Oprah Winfrey Show" from 2006 until the show ended in 2011. She was co-president of OWN with Erik Logan from July 2011 until May 2016.
ground_truth: All Media