Question: Are Alfred L. Werker and Merian C. Cooper both directors?

Context paragraphs:
Creation (unfinished film): Creation is an unfinished feature film, and a project of stop motion animator Willis O'Brien.  It was about modern men encountering dinosaurs and other prehistoric animals on an island.  The picture was scrapped by RKO studio head David O. Selznick on the grounds of expense, and Merian C. Cooper, the studio producer who recommended the film's cancellation, considered the storyline to be boring, due to lack of action.  The completed footage ran twenty minutes in length, although approximately four minutes of footage is all that survives today.  Cooper later used some of the miniatures and dinosaur armatures and O'Brien's stop-motion animation techniques for "King Kong".

Mark Cotta Vaz: Mark Cotta Vaz (born September 16, 1954, in San Francisco, California) is an American author, editor and film historian.  He has authored over thirty books, including four "New York Times" bestsellers.  He has focused on documenting film special effects and other behind-the-scenes aspects of visual presentation.  He has written about these aspects for both "Star Wars" and "Star Trek".  He has produced a number of movie companion books, such as those for "The Spirit", "Beautiful Creatures" and four for the "Twilight" series. " Publishers Weekly" said about his biography of Merian C. Cooper: "The charismatic Cooper, "a man living his own movie," is no longer an obscure, remote figure, thanks to Vaz's exhaustive research and skillful writing."

Mount Cooper (Antarctica): Mount Cooper ( ) is a large mountain standing 4 nautical miles (7 km) west of Asman Ridge on the south side of Arthur Glacier, in the Ford Ranges of Marie Byrd Land in Antarctica.  It was discovered on aerial flights in 1934 by the Byrd Antarctic Expedition, and named by Byrd for Merian C. Cooper, motion picture producer of Hollywood.

Advice to the Lovelorn: Advice to the Lovelorn is a 1933 American Pre-Code drama film directed by Alfred L. Werker and written by Leonard Praskins.  The film stars Lee Tracy, Sally Blane, Paul Harvey, Sterling Holloway, C. Henry Gordon and Isabel Jewell.  The film was released on December 1, 1933, by United Artists.

Rebel in Town: Rebel in Town is a 1956 American Western film directed by Alfred L. Werker starring John Payne, Ruth Roman, J. Carrol Naish and Ben Cooper.  It contains stylistic elements of film noir.

King Kong (1933 film): King Kong is a 1933 American pre-Code monster adventure film directed and produced by Merian C. Cooper and Ernest B. Schoedsack.  The screenplay by James Ashmore Creelman and Ruth Rose was from an idea conceived by Cooper and Edgar Wallace.  It stars Fay Wray, Bruce Cabot and Robert Armstrong, and opened in New York City on March 2, 1933, to rave reviews.  It has been ranked by Rotten Tomatoes as the greatest horror film of all time and the twentieth greatest film of all time.

Lost Boundaries: Lost Boundaries is a 1949 American film directed by Alfred L. Werker that stars Beatrice Pearson, Mel Ferrer (in his first starring role), and Susan Douglas Rubes.  The film is based on William Lindsay White's book of the same title, a non-fiction account of Dr. Albert C. Johnston and his family who passed for white while living in New England in the 1930s and 1940s.  The film won the 1949 Cannes Film Festival award for Best Screenplay.

The Gay Caballero (1932 film): The Gay Caballero is a 1932 American Pre-Code Western film directed by Alfred L. Werker and written by Barry Conners and Philip Klein.  The film stars George O'Brien, Victor McLaglen, Conchita Montenegro, Linda Watkins, C. Henry Gordon and Weldon Heyburn.  The film was released on February 14, 1932, by Fox Film Corporation.

Merian C. Cooper: Merian Caldwell Cooper (October 24, 1893 – April 21, 1973) was an American aviator, United States Air Force and Polish Air Force officer, adventurer, screenwriter, film director, and producer.  Cooper was the founder of the Kościuszko Squadron during the Polish–Soviet War and was a Soviet prisoner of war for a time.  He was a notable movie producer, and got his start with film as part of the Explorers Club, traveling the world and documenting adventures.  He was a member of the board of directors of Pan American Airways, but his love of film always took priority.  During his film career, he worked for companies such as Pioneer Pictures, RKO Pictures, and Metro-Goldwyn-Mayer.  He is also credited as co-inventor of the Cinerama film projection process.  Cooper's most famous film was the 1933 movie "King Kong".  He was awarded an honorary Oscar for lifetime achievement in 1952 and received a star on the Hollywood Walk of Fame in 1960.

Alfred L. Werker: Alfred L. Werker (December 2, 1896 – July 28, 1975) was a film director whose work in movies spanned from 1917 through 1957.  After a number of film production jobs and assistant directing, Werker co-directed his first film, "Ridin' the Wind" in 1925 alongside director Del Andrews.  He was brought in by Fox Film Corporation executives to re-shoot and re-edit Erich von Stroheim's film "Hello, Sister! " (1933), co-starring Boots Mallory and ZaSu Pitts.

Supporting paragraphs: Alfred L. Werker Merian C. Cooper
Answer: yes