Question: Richard Bakalyan and Granger K. Costikyan, have which nationality?

Context paragraphs:
Granger K. Costikyan: Granger Kent Costikyan (29 March 1907 – 10 March 1998) was an Armenian-American banker.  His father who was from Merzifon in the Sivas Vilayet of the Ottoman Empire (present-day Turkey) had immigrated from Constantinople in 1884, and organised the successful import firm, Costikyan Freres (later known as Kent-Costikyan, Inc.) which still exists and specializes in oriental carpets.  Granger was educated at Hotchkiss School, graduating in 1925, and Yale University, graduating in 1929.  He was a member of the Skull and Bones secret society.

Paratroop Command: Paratroop Command is a 1959 war film directed by William Witney, starring Richard Bakalyan, Ken Lynch and Jack Hogan.  Quentin Tarantino, an admirer of Witney's work, considers this film to be among his four best.  American International Pictures originally released the film as a double feature with "Submarine Seahawk".

The Fox and the Hound: The Fox and the Hound is a 1981 American animated drama film produced by Walt Disney Productions and loosely based on the novel of the same name by Daniel P. Mannix.  The 24th Disney animated feature film, the film tells the story of two unlikely friends, a red fox named Tod and a hound dog named Copper, who struggle to preserve their friendship despite their emerging instincts and the surrounding social pressures demanding them to be adversaries.  Directed by Ted Berman, Richard Rich, and Art Stevens, the film features the voices of Mickey Rooney, Kurt Russell, Pearl Bailey, Jack Albertson, Sandy Duncan, Jeanette Nolan, Pat Buttram, John Fiedler, John McIntire, Dick Bakalyan, Paul Winchell, Keith Mitchell, and Corey Feldman.

Blame It on the Night: Blame It on the Night is a 1984 American drama film directed by Gene Taft and written by Len Jenkin.  The film stars Nick Mancuso, Byron Thames, Leslie Ackerman and Richard Bakalyan.  The film was released on November 2, 1984, by TriStar Pictures.

Harry Potter and the Chamber of Secrets (film): Harry Potter and the Chamber of Secrets is a 2002 British-American fantasy film directed by Chris Columbus and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film is the second instalment in the long-running "Harry Potter" film series.  It was written by Steve Kloves and produced by David Heyman.  Its story follows Harry Potter's second year at Hogwarts School of Witchcraft and Wizardry as the Heir of Salazar Slytherin opens the Chamber of Secrets, unleashing a monster that petrifies the school's denizens.  The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger.  The film is also the last film to feature Richard Harris as Professor Albus Dumbledore, due to his death that same year.

Richard Bakalyan: Richard Bakalyan (January 29, 1931 – February 27, 2015) was an Armenian American character actor who started his career playing juvenile delinquents in his first several films.

The Purple Heart: The Purple Heart is a 1944 American war film directed by Lewis Milestone.  The film stars Dana Andrews, Richard Conte, Farley Granger, Don "Red" Barry and Trudy Marshall.  Eighteen-year-old Farley Granger had a supporting role.

Juvenile Jungle (film): Juvenile Jungle is a 1958 American crime film directed by William Witney and written by Arthur T. Horman.  The film stars Corey Allen, Rebecca Welles, Richard Bakalyan, Anne Whitfield, Joe Di Reda and Joe Conley.  The film was released on April 24, 1958, by Republic Pictures.

Cartan–Brauer–Hua theorem: In abstract algebra, the Cartan–Brauer–Hua theorem (named after Richard Brauer, Élie Cartan, and Hua Luogeng) is a theorem pertaining to division rings.  It says that given two division rings "K" ⊆ "D" such that "xKx" is contained in "K" for every "x" not equal to 0 in "D", either "K" is contained in the center of "D", or "K" = "D" .  In other words, if the unit group of "K" is a normal subgroup of the unit group of "D", then either "K" = "D" or "K" is central .

List of Harry Potter cast members: Several actors of the United Kingdom and Ireland have voiced or portrayed characters appearing in the "Harry Potter" film series based on the book series by J. K. Rowling.  Daniel Radcliffe, Rupert Grint and Emma Watson have played Harry Potter, Ron Weasley and Hermione Granger in all the films.  When they were cast only Radcliffe had previously acted in a film.  Complementing them on screen are such actors as Helena Bonham Carter, Jim Broadbent, John Cleese, Robbie Coltrane, Warwick Davis, Ralph Fiennes, Michael Gambon, Brendan Gleeson, Richard Griffiths, Richard Harris, John Hurt, Jason Isaacs, Miriam Margolyes, Helen McCrory, Gary Oldman, Alan Rickman, Fiona Shaw, Maggie Smith, Timothy Spall, Imelda Staunton, David Thewlis, Emma Thompson, and Julie Walters, among others.  Thirteen actors have appeared as the same character in all eight films of the series.

Supporting paragraphs: Richard Bakalyan Granger K. Costikyan
Answer: Armenian-American