Title: The Killers of Mussolini
Content:  Buzz Kulik was both the producer and the director. A.E. Hotchner wrote the teleplay.
Title: The Killer (comics)
Content:  The series is being made into a film by Paramount Pictures which will be directed by David Fincher. In February 2021, it was announced that Fincher has moved the project to Netflix with news that Andrew Kevin Walker will write the script. Michael Fassbender is in talks to star in the film. Production is due to begin in November 2021.
Title: The Killer (1989 film)
Content:  American producers to have Hong Kong actress Michelle Yeoh play the role of the police officer to resolve any homoerotic reading of the film. A year later, screenwriters Jim Cash and Jack Epps, Jr. were hired by producers Charles Roven and Robert Cavallo to write a screenplay based on The Killer for Tristar, in which they wrote a third draft of the script was that was dated on 23 August 1993 which featured a story of a Caucasian hitman living in Hong Kong. This screenplay moved the focus from the pairing the hit man and the police detective characters to the characters of blinded night 
Title: Killer (1992 film)
Content:  Killer is a 1992 Telugu-language action thriller film, written and directed by Fazil, produced by V. B. Rajendra Prasad under his Jagapathi Art Pictures banner. It stars Nagarjuna, Nagma and the music was composed by Ilaiyaraaja.
Title: The Killer and the Slain
Content:  In 1945 producer Sydney Box announced plans to make a film version of novel, and took the project with him when he was appointed by the Rank Organisation as head of Gainsborough Pictures. A script was commissioned from Bridget Boland while Eric Portman was set to star with Harold French as director. However in May 1947 the Rank board chose to cancel the production, despite the £15,000 already spent, "on the grounds that it was too sadistic and gloomy for present day audiences".
Title: The Killer (1989 film)
Content:  singer and the hit man. In October 2007, The Hollywood Reporter announced that a remake of The Killer was announced with Korean-American director John H. Lee directing. The remake would take place in Los Angeles's Koreatown, Chinatown, and South Central. Lee named The Killer as one of his favorite films and that he was excited to make his own version of the film. Lee's version was set to be produced by Woo, and star Jung Woo-sung and shot in 3D. Seven Stars Film Studios was slated to finance the production with a screenplay by Josh Campbell. Sarah Li was initially cast to play the role 
Title: Killer (TV series)
Content:  Killer is a British television series which originally aired on ITV in 1984. It consisted of three stand-along episodes, produced by Yorkshire Television.
Title: Killer Movie
Content:  Killer Movie is a 2008 American slasher film released in the United States in on April 24. The film premiered during the 2008 Tribeca Film Festival in New York City. It stars Paul Wesley, Kaley Cuoco, Jason London, Torrey DeVitto and Leighton Meester and was written and directed by Jeff Fisher. Killer Movie was produced by Cornelia Ryan Taylor, Michael Sanchez and Jeff Fisher.
Title: The Killer (1989 film)
Content:  In 1992, American filmmaker Walter Hill and David Giler wrote a screenplay for Tri-Star Pictures titled The Killer that was dated 6 April 1992. The press release of this remake stated the script was written for actors Richard Gere and Denzel Washington. In June 1992, it was announced Walter Hill and Giler were writing a script titled Hong Kong based on The Killer with Hill directing. The producers had difficulty with the relationship between two main characters in the script as they felt that American audiences would interpret it as a homoerotic one. Producer Terence Chang, who worked with Woo on several productions, suggested to 
Title: The Killer (2017 film)
Content:  The Killer (O Matador) is a 2017 Brazilian western created and directed by Marcelo Galvão, starring Diogo Morgado, Nill Marcondes, Deto Montenegro, Maria de Medeiros and Étienne Chicot. Principal photography began in August, 2016. The film was distributed by Netflix, premiering on 10 November 2017.

Question: Who was the producer of The Killer?
Answer: Tsui Hark.