Question: Who is a executive producer and American filmmaker and entrepreneur?
Context: Shawn Efran is an American filmmaker, journalist, television producer, and media entrepreneur.  His work, including as producer for "60 Minutes" on CBS, and as founder and executive producer of Efran Films, has garnered critical acclaim, including Emmy, Peabody, and Society of Professional Journalists National Distinguished Public Service Award. Brad Kern is an American television producer and writer.  He has been Executive Producer/Showrunner of CBS TV's hit, "" since midway through season two.  Previously, he served as Executive Producer/Showrunner on CW's supernatural, "Beauty and the Beast" for three seasons; and, prior to that, Executive Producer of the FOX action adventure, "Human Target".  He was also Executive Producer/Showrunner on the hit supernatural drama "Charmed" for all eight seasons.  Before that, he was Executive Producer/Showrunner of the award-winning Fox series "New York Undercover".  Other previous credits include Co-Executive Producer on "", Supervising Producer on "The Adventures of Brisco County, Jr.", and Executive Story Editor on "Hill Street Blues". Scott Rosenbaum is a film and television screenwriter, producer, and showrunner.  Scott recently served as the Executive Producer and Showrunner of ABC’s science fiction drama "V" and Fox’s crime drama "Gang Related".  Previously, he was an Executive Producer on NBC's "Chuck" and an Executive Producer on FX’s award-winning drama "The Shield".  As an original member of the show's writing staff, Rosenbaum has won numerous awards for his achievements on "The Shield" including a Golden Globe for Best Drama, an American Film Institute Award for Best Television Drama as well as the prestigious George Foster Peabody Award.  He is currently the executive producer and showrunner of "Queen of the South" for USA Network. Brian William Koppelman (born in 1966) is an American filmmaker, essayist, podcaster, TV series creator, former music business executive and record producer.  Koppelman is the co-writer of "Ocean's Thirteen" and "Rounders", the producer for films including "The Illusionist" and "The Lucky Ones", the director for films including "Solitary Man" and the documentary "This Is What They Want" for ESPN as part of their "30 for 30" series, and the co-creator, showrunner, and executive producer of Showtime's "Billions". Return of the Jedi (also known as Star Wars: Episode VI – Return of the Jedi) is a 1983 American epic space opera film directed by Richard Marquand.  The screenplay by Lawrence Kasdan and George Lucas was from a story by Lucas, who was also the executive producer.  It was the third installment in the original "Star Wars" trilogy and the first film to use THX technology.  The film is set one year after "The Empire Strikes Back" and was produced by Howard Kazanjian for Lucasfilm Ltd.  The film stars Mark Hamill, Harrison Ford, Carrie Fisher, Billy Dee Williams, Anthony Daniels, David Prowse, Kenny Baker, Peter Mayhew and Frank Oz. David Burris (sometimes credited as Dave Burris or David Allen Burris) is an American filmmaker, television producer, writer and musician.  He directed the feature film "The World Made Straight" ("Millennium Entertainment") and the short film "The Side of the Road", which he also wrote.  He was the executive producer on CBS's "Survivor" and a writer on the USA/SyFy series "Good vs. Evil".  As a musician, he was a founding member and songwriter for Sire/Warner recording artists Jolene and a recording and touring member of Mercury/Polygram recording artists The Veldt. John R. Montgomery IV is a television producer and advertising industry veteran.  Currently, he serves as an Executive Producer for the CBS series "Superior Donuts".  Previously, he was an Executive Producer on the CW reboot of "MADtv" and the Creator/Executive Producer of the web series "Attention Deficit Theater", which made its debut at SXSW and is available on CW Seed.  In addition, Montgomery was an Executive Producer on CBS' "The Crazy Ones".  There, he also received the unique credit: "Suggested by the Experiences of" as the series was based in part on Montgomery's 33-year career at the Leo Burnett advertising agency in Chicago.  Show creator David E. Kelley cited Montgomery as the inspiration for the "The Crazy Ones" and character Simon Roberts, portrayed by Robin Williams. Dete Meserve is an award-winning and bestselling author as well as film and television executive and a principal of Wind Dancer Films.  Wind Dancer Films is best known as the creators and producers of Home Improvement starring Tim Allen, What Women Want starring Helen Hunt and Mel Gibson, Where The Heart Is starring Natalie Portman.  Meserve's credits include producing Bernie starring Jack Black, Shirley MacLaine and Matthew McConaughey, executive producer of Walker Payne starring Sam Shepard and Jason Patric, executive producer of the TV series Wildest Africa for Discovery International, executive producer of As Cool As I Am, starring Claire Danes and James Marsden.  In 2014, she was an executive producer of the George Lopez sitcom, "Saint George," and producer of the thriller, The Keeping Room starring Sam Worthington, Hailee Steinfeld and Brit Marling.  She is currently an Executive Producer of the hit kids television series Ready Jet Go on PBSKids. Jeff Hickman is a video game designer, producer and customer support specialist currently working as the executive producer of live services for BioWare.  His main task is to oversee the live services and operations of .  Hickman entered the gaming business in 2001 working for Mythic Entertainment as their director of customer support for the MMORPG "Dark Age of Camelot".  In 2005, he was promoted to executive producer, for DAOC.  In 2006, he became the executive producer of "".  In January 2011 Hickman was named executive producer of live services for Bioware. George Walton Lucas Jr. (born May 14, 1944) is an American filmmaker and entrepreneur.
Answer: George Lucas