Question: What nationality is the actor who starred in a sitcom created by Graham Linehan?

Context paragraphs:
List of Father Ted episodes: This is an episode guide for the sitcom "Father Ted" created by Arthur Mathews and Graham Linehan.  The series aired on British broadcaster Channel 4 between 21 April 1995 and 1 May 1998.

Count Arthur Strong (TV series): Count Arthur Strong is a BBC sitcom written by Steve Delaney and Graham Linehan.  Delaney portrays the title character in the series, a stage creation of Delaney's who has also featured in the BBC Radio 4 programme "Count Arthur Strong's Radio Show! " The series begins with the meeting of Count Arthur Strong, an eccentric, septuagenarian, former music hall performer, with Michael Baker, the bookish son of his former comedy partner.

Big Train: Big Train is a surreal British television comedy sketch show created by Arthur Mathews and Graham Linehan, writers of the sitcom "Father Ted".  The first series was broadcast on BBC Two in 1998, while the second, in which Linehan was not involved, aired in 2002.

Hello Friend: Hello Friend, sometimes written as Hello, Friend, is a short comedy horror film directed by Graham Linehan and written by Linehan and Robert Popper.  The film was Linehan's directorial debut.  The film stars Martin Savage as a man, John Ward, but credited as the "Subject", who buys some new internet software for his computer, which begins to take over his life.  The film was produced by The Film Council, Film4 Productions and Shine Limited.

Father Dougal McGuire: Father Dougal McGuire is a character in the Channel 4 sitcom "Father Ted".  Created by Arthur Mathews and Graham Linehan, Dougal was portrayed by comedian Ardal O'Hanlon for the programme's three series.  The character is a childlike, simple-minded Roman Catholic priest exiled to Craggy Island, a small island off the coast of Galway.

Dermot Morgan: Dermot John Morgan (31 March 1952 – 28 February 1998) was an Irish comedian, actor and previously a schoolteacher, who achieved international renown for his role as Father Ted Crilly in the Channel 4 sitcom "Father Ted".

Black Books: Black Books is a British sitcom created by Dylan Moran and Graham Linehan and broadcast on Channel 4 from 2000 to 2004.  Starring Moran, Bill Bailey and Tamsin Greig, the series is set in the eponymous London bookshop and follows the lives of its owner Bernard Black (Moran), his assistant Manny Bianco (Bailey) and their friend Fran Katzenjammer (Greig).  The series was produced by Big Talk Productions, in association with Channel 4.

List of Black Books episodes: "Black Books", an English sitcom television series created by Dylan Moran and Graham Linehan, premiered on 29 September 2000 on Channel 4 in the United Kingdom and Ireland, and ended on 15 April 2004.  The show spans 18 episodes over three series.  The original 45 minute pilot, recorded in 1998, has not been broadcast and all other episodes were approximately 25 minutes long.  Moran and Linehan decided to end the show in its third series.  Moran has stated that there will be no more episodes and "The Times" reported the series has been "killed off".

Father Ted Crilly: Father Ted Crilly is the title character of the Channel 4 sitcom "Father Ted".  Created by Graham Linehan and Arthur Mathews, Ted was portrayed by comedian Dermot Morgan for the programme's three series.  The character is a morally dubious Roman Catholic priest exiled to Craggy Island, a small island off the coast of Galway.

Paris (1994 TV series): Paris is a British sitcom produced by Talkback Productions for Channel 4.  It was written jointly by Irish writers Arthur Mathews and Graham Linehan, best known for their later sitcom Father Ted.  The show only lasted one series consisting of six episodes in October and November 1994.  It featured the escapades of French artist Alain Degout living in 1920s Paris, who wants to be famous, but his work gets him nowhere.  Unlike BBC sitcom 'Allo 'Allo, which was also set in France, featuring characters speaking in French accents, the characters of Paris spoke in an English accent.

Supporting paragraphs: Father Ted Crilly Dermot Morgan
Answer: Irish