Question: What nationality is the actor who plays John Winchester?

Context paragraphs:
Sutter's Gold: Sutter's Gold is a 1936 fictionalized film version of the aftermath of the discovery of gold on Sutter's property, spurring the California Gold Rush of 1849.  Edward Arnold plays John Sutter.  The supporting cast includes Lee Tracy, Binnie Barnes, Katherine Alexander, Montagu Love, and Harry Carey as Kit Carson.

Jeffrey Dean Morgan: Jeffrey Dean Morgan (born April 22, 1966) is an American actor.  He is known for playing John Winchester on "Supernatural", Denny Duquette on the medical drama "Grey's Anatomy", The Comedian in the 2009 superhero film "Watchmen", Jason Crouse on "The Good Wife", and Negan on "The Walking Dead".

Toby Huss: Toby Huss (born December 9, 1966) is an American actor known for portraying Artie in the Nickelodeon series "The Adventures of Pete & Pete" (1993–1996).  He is also known for his voice-over work on the long-running animated series "King of the Hill" (1997–2010) and his role as Felix "Stumpy" Dreifuss on HBO's "Carnivàle" (2003–2005).  He currently plays John Bosworth on the AMC original period drama "Halt and Catch Fire".

McCoy Tyner Plays John Coltrane: Live at the Village Vanguard: McCoy Tyner Plays John Coltrane: Live at the Village Vanguard

John Winchester (Supernatural): John Eric Winchester is a fictional character on The CW's series "Supernatural", and the protagonist of the comic book spin-off series "".  Developed by series creator Eric Kripke, the character is mainly portrayed by Jeffrey Dean Morgan.  John is the father of Sam and Dean Winchester, the show's protagonists.

John W. Dana: John Winchester Dana (June 21, 1808 – December 22, 1867) was an American businessman and Democratic politician in the U.S. state of Maine.  He served as the 19th and 21st Governor of Maine and as Chargé d'affaires to Bolivia during the 19th century.

Matt Cohen (actor): Matthew Joseph "Matt" Cohen (born September 28, 1982) is an American film and television actor best known for playing young John Winchester and the archangel Michael in "Supernatural", Aiden Dennison on the teen drama series "South of Nowhere", and his current role as Griffin Munro on the ABC daytime soap "General Hospital".

John Mayall Plays John Mayall: John Mayall Plays John Mayall is the debut album by John Mayall & the Bluesbreakers, released in 1965, Decca LK 4680.  This album was recorded live at Klooks Kleek on none }} .  Roger Dean stated in an interview that they ran cables out of the window of the club to the Decca Studio about 100 yards away for this recording.

Blues Breakers with Eric Clapton: Blues Breakers with Eric Clapton ( The Beano Album) is a 1966 blues/blues rock album recorded by John Mayall & the Bluesbreakers with Eric Clapton as part of the band.  It is the second album credited to John Mayall after the live "John Mayall Plays John Mayall".  Clapton left to form Cream after this recording, though would team up again in 1971 for the double LP "Back to the Roots".

Crawling up a Hill: "Crawling up a Hill" is a song written by John Mayall, and recorded by John Mayall & the Bluesbreakers.  The song was released as a studio recorded single in 1964 and as part of the live album, "John Mayall Plays John Mayall", in 1965.  The single was the first released recording to feature future Fleetwood Mac core member John McVie on bass.

Supporting paragraphs: John Winchester (Supernatural) Jeffrey Dean Morgan
Answer: American