Question: What nationality is the actor of the comedy film about a man's multiple failed suicide attempts?

Context paragraphs:
The Home Maker: The Home Maker is a 1925 American silent drama film directed by King Baggot and starring Alice Joyce, Clive Brook and Billy Kent Schaefer.  After he injures himself in a failed suicide attempt a man stays at home to look after the children while his wife goes out to work.  Both are more successful once they have swapped roles.

Soulmate (film): Soulmate is a 2013 British horror film and the feature film directorial debut of Axelle Carolyn.  The film had its world premiere on 18 October 2013 at the Sitges Film Festival in Spain.  It stars Anna Walton as a woman who travels to the countryside to recuperate after a failed suicide attempt but finds that her cottage is haunted by a ghost.

Je t'aime, je t'aime: Je t'aime, je t'aime ("I Love You, I Love You") is a 1968 French science fiction film directed by Alain Resnais from a screenplay by Jacques Sternberg.  The plot centres on Claude Ridder (Claude Rich) who is asked to participate in a mysterious experiment in time travel when he leaves the hospital after a failed suicide attempt.  The experiment, intended to return him after one minute of observing the past, instead causes him to experience his past in a disjointed fashion.  His fate is left ambiguous.

Willy Loman: William "Willy" Loman is a fictional character and the protagonist of Arthur Miller's classic play "Death of a Salesman", which debuted on Broadway with Lee J. Cobb playing Loman at the Morosco Theatre on February 10, 1949.  Loman is a 63-year-old travelling salesman from Brooklyn with 34 years of experience with the same company who endures a pay cut and a firing during the play.  He has difficulty dealing with his current state and has created a fantasy world to cope with his situation.  This does not keep him from multiple suicide attempts.

Prairie Dog State Park: Prairie Dog State Park is a state park located southwest of Norton, Kansas, United States.  Located in western Kansas, the Prairie Dog State Park had no prairie dog populations living there when it was established.  After multiple failed attempts at introducing the species to the park, a pair of prairie dogs entered by themselves and since then the park has been populated with over 300 prairie dogs.

The Story of Paul: The Story of Paul (French: Histoire de Paul ) is a 1975 French drama film written and directed by René Féret.  The film follows a man named Paul, who is institutionalised after a failed suicide attempt.  The film won the Prix Jean Vigo in 1975.

Beck Hopelessness Scale: The Beck Hopelessness Scale (BHS) is a 20-item self-report inventory developed by Dr. Aaron T. Beck that was designed to measure three major aspects of hopelessness: feelings about the future, loss of motivation, and expectations.  The test is designed for adults, age 17-80.  It measures the extent of the respondent's negative attitudes, or pessimism, about the future.  It may be used as an indicator of suicidal risk in depressed people who have made suicide attempts.  The test is multiple choice.  It is not designed for use as a measure of the hopelessness construct but has been used as such.  Sufficient data about the use of the test with those younger than 17 has not been collected.  It may be administered and scored by paraprofessionals; but must be used and interpreted only by clinically trained professionals, who can employ psychotherapeutic interventions.  Norms are available for suicidal patients and depressed patients and drug abusers.

Don Ritchie: Donald Taylor "Don" Ritchie, OAM (9 June 1925 – 13 May 2012) was an Australian who officially rescued 160 people from suicide as of 2009 over a 45-year period, although his family claims the number is closer to 500.  Ritchie resided next to The Gap, a cliff in Sydney, Australia, known for multiple suicide attempts.  In 2006, he was awarded the Medal of the Order of Australia for his rescues, the official citation being for "service to the community through programs to prevent suicide."  Ritchie and his wife Moya were also named "Citizens of the Year" for 2010 by Woollahra Council, the local government authority responsible for The Gap.  He received Local Hero Award for Australia in 2011, the National Australia Day Council saying: "His kind words and invitations into his home in times of trouble have made an enormous difference ... With such simple actions, Don has saved an extraordinary number of lives."

Cha Tae-hyun: Cha Tae-hyun (born March 25, 1976) is a South Korean actor, singer, television personality radio DJ and director.  He is best known for his lead roles in the box-office hit comedies "My Sassy Girl" (2001), "Scandal Makers" (2008) and "Hello Ghost" (2010) as well as the television series "Jeon Woo-chi" (2012) and "The Producers" (2015).  He made his directorial debut with the variety-drama "Hit the Top" (2017), in which he also stars.

Hello Ghost: Hello Ghost () is a 2010 South Korean comedy film about a man's multiple failed suicide attempts.  After the most recent one, he discovers he can see a family of ghosts.  The ghosts agree to leave him alone under the condition that he fulfill their requests.

Supporting paragraphs: Cha Tae-hyun Hello Ghost
Answer: South Korean