Question: What actor portrayed David Dunn in the American superhero thriller film "Unbreakable"?

full_context: Document 1: Brandon Routh: Brandon James Routh (born October 9, 1979) is an American actor and former fashion model. He grew up in Iowa before moving to Los Angeles to pursue an acting career, and subsequently appeared on multiple television series throughout the early 2000s. In 2006, he gained greater recognition for his role as the titular superhero of the 2006 film "Superman Returns". He also had a recurring role in the TV series "Chuck", as Daniel Shaw. Following this, he had notable supporting roles in the films "Zack and Miri Make a Porno" and "Scott Pilgrim vs. the World". In 2014, he began a recurring role on "Arrow" as Ray Palmer/Atom which spun off into a guest role on "The Flash" and a starring role on "Legends of Tomorrow".
Document 2: Chronicle (film): Chronicle is a 2012 American found footage science-fiction thriller film directed by Josh Trank and written by Max Landis based on a story by both. It follows three Seattle high school seniors, bullied Andrew (Dane DeHaan), his cousin Matt (Alex Russell) and more popular Steve (Michael B. Jordan), who form a bond after gaining telekinetic powers from an unknown object. They first use their abilities for mischief and personal gain until Andrew turns to darker purposes.
Document 3: David Dunn (American football): David Dunn (born June 10, 1972) is a former American football wide receiver and return specialist in the National Football League. He was drafted by the Cincinnati Bengals in the fifth round of the 1995 NFL Draft. He played college football at Fresno State after transferring from Bakersfield Junior College.
Document 4: Man of Steel (film): Man of Steel is a 2013 superhero film featuring the DC Comics character Superman. It is a British-American venture produced by Legendary Pictures, DC Entertainment, Syncopy Inc., and Cruel and Unusual Films, and distributed by Warner Bros. Pictures. It is the first installment in the DC Extended Universe (DCEU). The film is directed by Zack Snyder, written by David S. Goyer, and stars Henry Cavill, Amy Adams, Michael Shannon, Kevin Costner, Diane Lane, Laurence Fishburne, Antje Traue, Ayelet Zurer, Christopher Meloni, and Russell Crowe. "Man of Steel" is a reboot of the "Superman" film series that retells the character's origin story. In the film, Clark Kent learns that he is a superpowered alien from the planet Krypton and assumes the role of mankind's protector as Superman, but finds himself having to prevent General Zod from destroying humanity.
Document 5: The Sixth Sense: The Sixth Sense is a 1999 American supernatural horror-thriller film written and directed by M. Night Shyamalan. The film tells the story of Cole Sear (Haley Joel Osment), a troubled, isolated boy who is able to see and talk to the dead, and an equally troubled child psychologist named Malcolm Crowe (Bruce Willis) who tries to help him. The film established Shyamalan as a writer and director, and introduced the cinema public to his traits, most notably his affinity for surprise endings.
Document 6: Bruce Willis: Walter Bruce Willis (born March 19, 1955) is an American actor, producer, and singer. His career began on the Off-Broadway stage and then in television in the 1980s, most notably as David Addison in "Moonlighting" (1985–1989). He is known for his role of John McClane in the film "Die Hard" (1988) and its four sequels. He has appeared in over 60 films, including "Death Becomes Her" (1992), "Color of Night" (1994), "Pulp Fiction" (1994), "Nobody's Fool" (1994), "12 Monkeys" (1995), "The Fifth Element" (1997), "Armageddon" (1998), "The Sixth Sense" (1999), "Unbreakable" (2000), "Sin City" (2005), "Lucky Number Slevin" (2006), "Red" (2010), "Moonrise Kingdom" (2012), "The Expendables 2" (2012), and "Looper" (2012). The actor has also done voice overs for movies such as "Look Who's Talking" (1989), "Beavis and Butt-Head Do America" (1996), "Rugrats Go Wild" (2003) and "Over the Hedge" (2006).
Document 7: Sam Mercer: Sam Mercer is a producer of many Hollywood films, including several projects directed by M. Night Shyamalan such as "Signs", "Lady in the Water" and "Unbreakable", as well as other films like "Van Helsing" and "Things We Lost in the Fire". His career started during the early 1980s as a location manager and later advanced to a producer and executive producer. He also produced the M. Night Shyamalan films "The Happening" and "The Last Airbender".
Document 8: David Dunn (character): David Dunn is a fictional character and the main protagonist in the "Unbreakable" film series, portrayed by American actor Bruce Willis. Dunn is a former college football prodigy and presently a security guard who discovers he has superhuman abilities.
Document 9: M. Night Shyamalan: Manoj Nelliyattu "M. Night" Shyamalan ( ; ; "Maṉōj Nelliyāṭṭu Śyāmaḷaṉ"; Tamil: மனோஜ் நெல்லியட்டு ஷியாமளன் ; Malayalam: മനോജ് നെല്ലിയാട്ട് ശ്യാമളന്‍ born 6 August 1970) is an Indian American film director, screenwriter, author, producer, and actor known for making movies with contemporary supernatural plots and surprise endings. His most well-received films include the supernatural horror thriller "The Sixth Sense" (1999), the superhero drama thriller "Unbreakable" (2000), and the science fiction thriller "Signs" (2002). Afterwards, Shyamalan released a series of poorly received but sometimes financially successful movies, including the historical drama-horror film "The Village" (2004), the fantasy film "Lady in the Water" (2006), the disaster film "The Happening" (2008), the film adaptation of "The Last Airbender" (2010), and the science-fiction film "After Earth" (2013). Following the financial failure of "After Earth," Shyalaman's career was revived with the release of the found footage horror "The Visit" (2015) and the psychological horror "Split" (2016), the latter of which is set in the same universe as his previous film "Unbreakable". He is also known for producing "Devil" (2010), as well as being instrumental in the creation of the Fox science fiction series "Wayward Pines.
Document 10: The Incredible Hulk (film): The Incredible Hulk is a 2008 American superhero film based on the Marvel Comics character the Hulk, produced by Marvel Studios and distributed by Universal Pictures. It is the second film in the Marvel Cinematic Universe (MCU). The film was directed by Louis Leterrier, with a screenplay by Zak Penn. It stars Edward Norton, Liv Tyler, Tim Roth, Tim Blake Nelson, Ty Burrell, and William Hurt. In "The Incredible Hulk", a new backstory is established where Bruce Banner becomes the Hulk as an unwitting pawn in a military scheme to reinvigorate the supersoldier program through gamma radiation. On the run, he attempts to cure himself of the Hulk before he is captured by General Thaddeus Ross, but his worst fears are realized when power-hungry soldier Emil Blonsky becomes a similar, but more bestial creature.
Document 11: Daredevil (film): Daredevil is a 2003 American superhero film written and directed by Mark Steven Johnson. Based on the Marvel Comics character of the same name, the film stars Ben Affleck as Matt Murdock, a blind lawyer who fights for justice in the courtroom and on the streets of New York as the masked vigilante Daredevil. Jennifer Garner plays his love interest Elektra Natchios; Colin Farrell plays the merciless assassin Bullseye; David Keith plays Jack "The Devil" Murdock, a washed up fighter and Matt's father; and Michael Clarke Duncan plays Wilson Fisk, also known as the crime lord Kingpin.
Document 12: Luc Deveraux: Luc Deveraux is a fictional character and the protagonist of the "Universal Soldier" film series. He is most famously portrayed by Belgian actor and martial artist Jean-Claude Van Damme. Van Damme portrays Luc in the 1992 film "Universal Soldier" and its sequels "" (1999), "" (2009), and "" (2012); he is portrayed by Matt Battaglia in the direct-to-video sequels "" (1998) and "" (1998).
Document 13: Unbreakable (film): Unbreakable is a 2000 American superhero thriller film written, produced, and directed by M. Night Shyamalan, and starring Bruce Willis and Samuel L. Jackson, alongside Robin Wright and Spencer Treat Clark. The movie is the first installment in a trilogy. In "Unbreakable", a security guard named David Dunn survives a horrific train crash. After the incident, with the help of a manipulative disabled comic book shop owner named Elijah Price, he learns that he possesses superhuman powers. As Dunn explores and reluctantly confronts his powers while trying to navigate a difficult family life, he begins to fight crime and learns the true nature of Elijah Price.
Document 14: Hulk (film): Hulk is a 2003 American superhero drama film based on the fictional Marvel Comics character of the same name. Ang Lee directed the film, which stars Eric Bana as Dr. Bruce Banner, as well as Jennifer Connelly, Sam Elliott, Josh Lucas, and Nick Nolte. The film explores the origins of Bruce Banner, who after a lab accident involving gamma radiation finds himself able to turn into a huge green-skinned monster whenever he gets angry, while he is pursued by the United States military and comes into a conflict with his father.
Document 15: Benji Dunn: Benjamin "Benji" Dunn is a fictional character in the . He is portrayed by Simon Pegg.
ground_truth: Bruce Willis