Question: Tim Webber is an English visual effects supervisor, he is known for his work on The Dark Knight, a 2008 superhero film directed, co-produced, and co-written by who?

Context paragraphs:
Nick Davis (visual effects supervisor): Nick Davis is a visual effects supervisor who has worked in visual effects since the early 1990s.  He was nominated at the 81st Academy Awards for "The Dark Knight".  He was nominated in the category of Best Visual Effects, he shared his nomination with Chris Corbould, Paul Franklin and Tim Webber.

Paul Franklin (visual effects supervisor): Paul J. Franklin is an English visual effects supervisor who has worked with visual effects since the 1990s.  He is known for his long-running working relationship with director Christopher Nolan which dates back to "Batman Begins" (2005).  Franklin won the Academy Award for Best Visual Effects and the BAFTA Award for Best Special Visual Effects for "Inception" (2010), and won a second Academy Award for Best Visual Effects for "Interstellar" (2014).  He shared the wins with Andrew Lockley, Peter Bebb, and Chris Corbould.  Franklin has also been nominated for an Academy Award for "The Dark Knight" (2008).  He was nominated for BAFTA Awards for "Batman Begins", "The Dark Knight" (2008), and "The Dark Knight Rises" (2012).

The Dark Knight (film): The Dark Knight is a 2008 superhero film directed, co-produced, and co-written by Christopher Nolan.  Featuring the DC Comics character Batman, the film is the second part of Nolan's "The Dark Knight Trilogy" and a sequel to 2005's "Batman Begins", starring an ensemble cast including Christian Bale, Michael Caine, Heath Ledger, Gary Oldman, Aaron Eckhart, Maggie Gyllenhaal and Morgan Freeman.  In the film, Bruce Wayne/Batman (Bale), Police Lieutenant James Gordon (Oldman) and District Attorney Harvey Dent (Eckhart) form an alliance to dismantle organized crime in Gotham City, but are menaced by a criminal mastermind known as the Joker (Ledger) who seeks to undermine Batman's influence and create chaos.

Vincent Cirelli: Vincent Cirelli is a special effects supervisor.  Known for his works at Luma Pictures as a visual effects supervisor in acclaimed films such as "" (2007), "No Country for Old Men" (2007), "The Midnight Meat Train" (2008), "" (2008), "Harry Potter and the Half-Blood Prince" (2009), "The Book of Eli" (2010), "" (2011), "" (2012), "Prometheus" (2012), "The Avengers" (2012), "Saving Mr. Banks" (2013), "Guardians of the Galaxy" (2014), "" (2015), "In the Heart of the Sea" (2015), "Deadpool" (2015) and "Doctor Strange" (2016), for which he received an Academy Award for Best Visual Effects nomination at the 89th Academy Awards.

Tim Webber: Tim Webber is an English visual effects supervisor.  He is known for his work on "Harry Potter and the Goblet of Fire" (2005), "The Dark Knight" (2008), "Avatar" (2009), and "Gravity" (2013), for which he received an Academy Award for Best Visual Effects at the 86th Academy Awards.

Richard Bluff: Richard Bluff is an English special effects supervisor.  Known for his works in Disney's visual effects company Industrial Light & Magic (ILM) as a digital matte artist and visual effects supervisor in acclaimed films such as "" (2005), "The Island" (2005), "Transformers" (2007-11), "Indiana Jones and the Kingdom of the Crystal Skull" (2008), "Star Trek" (2009), "Avatar" (2009), "The Avengers" (2012), "Cloud Atlas" (2012) "Pacific Rim" (2013), "The Big Short" (2015) and "Doctor Strange" (2016), for which he received an Academy Award for Best Visual Effects nomination at the 89th Academy Awards.  He previously worked at Blur Studio as digital artist.

List of accolades received by The Dark Knight: "The Dark Knight" is a 2008 superhero film directed, produced, and co-written by Christopher Nolan.  It was released in Australia on July 16, 2008.  "The Dark Knight" grossed $1,004,558,444 worldwide, becoming the fourth film in history to gross more than $1 billion worldwide and the highest-grossing film of 2008.  It is currently the 16th highest-grossing film of all time.  "The Dark Knight" also received a high critical acclaim, accumulating an approval rating of 94% on the review aggregator site Rotten Tomatoes.

John Knoll: John Knoll (born October 6, 1962) is an American visual effects supervisor and chief creative officer (CCO) at Industrial Light & Magic (ILM).  One of the original creators of Adobe Photoshop (along with his brother, Thomas Knoll), he has also worked as visual effects supervisor on the "Star Wars" prequels and the 1997 special editions of the original trilogy.  He also served as ILM's visual effects supervisor for "Star Trek Generations" and "", as well as the "" series.  Along with Hal Hickel, Charles Gibson and Allen Hall, Knoll and the trios work on "" earned them the Academy Award for Best Visual Effects.

Visual effects supervisor: In the context of film and television production, a visual effects supervisor is responsible for achieving the creative aims of the director and/or producers through the use of visual effects.  While it is a creative role, most supervisors possess a strong technical background and are capable of making informed decisions about the most efficient and effective technique to employ to solve the problem at hand.  Often a supervisor will work in tandem with a visual effects producer and computer graphics supervisor.

Christopher Townsend: Christopher Townsend is a visual effects supervisor.  He has worked in the visual effects industry for over 20 years.  For over a decade, he was an artist and supervisor at Industrial Light and Magic, and in 2007 became a freelance visual effects supervisor.  He worked on "Journey to the Center of the Earth", the first ever stereoscopic motion picture shot and released digitally, "Wolverine", "Ninja Assassin", "" and "".  He was nominated for a BAFTA and an Academy Award for Best Visual Effects for his work on "Iron Man 3", oversaw nearly 3000 shots on "" and was the overall supervisor for "Guardians of the Galaxy Vol.  2".  In 2015 he was given an Honorary Doctor of Arts degree by his alma mater, Coventry University.

Supporting paragraphs: Tim Webber The Dark Knight (film)
Answer: Christopher Nolan