Question: Which of the writer for which Joseph Maher took a role of their character died on 9 August 1967?

Context articles: Stone Cates
1967 Opium War
It's Too Late – We're On!
Joseph Maher
Joe Orton
Hope Wilson
Cesare Rossi (politician)
Ehsan Masood
Kenneth Halliwell
Dheer Charan Srivastav

Stone Cates is a fictional character on the ABC soap opera, "General Hospital".
 Michael Sutton portrayed him from 1993 to 1995 and returned for a guest appearance from September 28 through September 29, 2010 and on August 1, 2017.
 The character died of AIDS-related illness in 1995 at age 19.
 Sutton was nominated for a 1996 Daytime Emmy Award for Outstanding Supporting Actor in a Drama Series for the role.
The 1967 Opium War took place in northwestern Laos between February and August 1967; actual fighting took place from 29 July to 1 August 1967.
 A Burmese mule train carrying 16 tons of opium crossed into Laos to Ban Khwan, where they were attacked by rival drug smugglers from the Chinese Nationalist's Third and Fifth Armies.
 The intended recipient of the shipment, Royal Lao Army General Ouane Rattikone, bombed both sides while moving in troops to sweep the battlefield.
 With both Burmese and Nationalist Chinese defeated and expelled from Laos, the Lao general confiscated the opium for himself.
It's Too Late – We're On!
 is an Irish television sketch show that aired on RTÉ for one series in 1967.
 The show, first broadcast on 9 August 1967, featured a large cast, including Des Keogh and Frank Kelly.
 It is a comedy TV show.
Joseph Sylvester Maher (pronounced "Ma-her" or "Ma-HARR", December 29, 1933 – July 17, 1998) was an Irish-born naturalized American character actor, playwright and director, best known for his roles in 43 films.
 He was nominated for three Tony Awards, won a Drama Desk Award and Obie Award, and was a nominee of the Olivier Award for his supporting roles on the stage.
 He was best known for appearing in plays by Joe Orton.
John Kingsley "Joe" Orton (1 January 1933 – 9 August 1967) was an English playwright and author.
 His public career was short but prolific, lasting from 1964 until his death three years later.
 During this brief period he shocked, outraged, and amused audiences with his scandalous black comedies.
 The adjective "Ortonesque" is sometimes used to refer to work characterised by a similarly dark yet farcical cynicism.
Hope Wilson is a fictional character from the CBS soap opera "The Young and the Restless", portrayed by Signy Coleman.
 The character was introduced as a love interest for Victor Newman (Eric Braeden) in 1993.
 After her departure in 1997, Coleman reprised the role in 2000 and 2002.
 The role was then briefly portrayed by Beth Toussaint in 2006.
 In 2008, the character died onscreen, though Coleman continued to reprise the role as a vision had by other characters in 2010 and 2012.
Cesare Rossi (born 21 September 1887 in Pescia – died 9 August 1967 in Rome) was an Italian fascist leader who later became estranged from the regime.
Hassan Ehsan Masood (born 9 August 1967) is a science writer, journalist and broadcaster.
 Since 2009 he has been the editor of Research Professional News (including Research Fortnight) and has been teaching international science policy at Imperial College London.
 since 2008.
Kenneth Leith Halliwell (23 June 1926 – 9 August 1967) was a British actor, writer and collagist.
 He was the mentor, boyfriend and murderer of playwright Joe Orton.
Dheer Charan Srivastav or D. C. Srivastav (born 9 August 1967), is an Indian character actor, comedian and dialogue writer from Hyderabad, Telangana, who mostly appears in Hyderabad Deccani Urdu, Tollywood and Bollywood Films.
 He is most notable for his role as "Ismail Bhai" in comedy films, "The Angrez" (2006), "Hyderabad Nawabs" (2006) and "Hungama in Dubai" (2007).
 He is also known for his Hyderabadi dialect humor.