The Adventures of Tarzan (1921) is a 15 chapter movie serial which features the third and final appearance of Elmo Lincoln as Tarzan.
 The serial was produced by Louis Weiss, written by Robert F. Hill and Lillian Valentine (partially based on the novels "The Return of Tarzan" and "Tarzan and the Jewels of Opar" by Edgar Rice Burroughs), and directed by Robert F. Hill and Scott Sidney.
 The first chapter was released on December 1, 1921.
Her Own People is a 1917 American drama silent film directed by Scott Sidney and written by Gardner Hunting and Julia Crawford Ivers.
 The film stars Lenore Ulric, Colin Chase, Howard Davies, Adelaide Woods, Jack Stark and Gail Brooks.
 The film was released on February 8, 1917, by Paramount Pictures.
Desert Thieves is a 1914 American silent short western film directed by Scott Sidney and featuring Charles Ray, Gretchen Lederer, Tsuru Aoki, Frank Keenan and Ernest Swallow in lead roles.
The Road to Love is a surviving 1916 American drama silent film directed by Scott Sidney and written by Blanche Dougan Cole and Gardner Hunting.
 The film stars Lenore Ulric, Colin Chase, Lucille Ward, Estelle Allen, Gayne Whitman and Herschel Mayall.
 The film was released on December 7, 1916, by Paramount Pictures.
Together is a 1971 film directed by Sean S. Cunningham.
 Cunningham's first film attracted Wes Craven who wanted to be in the film business.
 This was Craven's first credit.
 Cunningham and Craven would later work on "The Last House on the Left".
 The film features a young Marilyn Chambers, billed under her real name, Marilyn Briggs, before she starred in "Behind the Green Door".
Scott Sidney (1872 – 20 July 1928), born Harry Wilbur Siggins, was an American film director.
 He directed 117 films between 1913 and 1927.
Sean Sexton Cunningham (born December 1, 1941) is an American film director, producer, and writer.
Sean Cunningham was a Royal Air Force pilot on the Red Arrows team, who died when his ejection seat initiated whilst the aircraft he was in was still on the ground and he was conducting pre-flight checks.
 The incident occurred at the Red Arrows' home base of RAF Scampton in Lincolnshire, England.
 The initiation of the ejection seat was, assumed to be by accident, however, the parachute on the seat did not deploy and Cunningham fell, still strapped to the seat, 220 ft to his death only 66 m away from the motionless aircraft.
 In 2017, Martin-Baker, the manufacturers of the seat had legal proceedings lodged against them by the Health and Safety Executive, for breach of Health and safety law regarding Cunningham's death.
Tarzan of the Apes is a 1918 American action/adventure silent film directed by Scott Sidney starring Elmo Lincoln, Enid Markey, George B. French and Gordon Griffith.
 It was the first Tarzan movie ever made and is based on Edgar Rice Burroughs' original novel "Tarzan of the Apes".
 The movie adapts only the first part of the novel, the remainder becoming the basis for the sequel, "The Romance of Tarzan".
 The film is considered the most faithful to the novel of all the film adaptations.
 Its most notable plot change is the introduction of the character Binns and his role in bringing the Porters to Africa; the novel brought them there through the improbable coincidence of a second mutiny.
813 is a 1920 American mystery film directed by Charles Christie and Scott Sidney, written by Scott Darling from the story by Maurice Leblanc, produced by Al Christie, released by the Christie Film Company and the Robertson-Cole Pictures Corporation, and starring Wedgwood Nowell as jewel thief Arsene Lupin with a supporting cast featuring Ralph Lewis, Wallace Beery, and Laura La Plante.

Question: Do directors Sean S. Cunningham and Scott Sidney have the same nationality?
Answer: yes