Join the Marines is a 1937 American action film/comedy directed by Ralph Staub and written by Joseph Krumgold and Olive Cooper.
 The film stars Paul Kelly, June Travis, Purnell Pratt, Reginald Denny, Warren Hymer and Irving Pichel.
 The film was released on January 25, 1937, by Republic Pictures.
Mama Runs Wild is a 1937 American comedy film directed by Ralph Staub and written by Gordon Kahn and Hal Yates.
 The film stars Mary Boland, Ernest Truex, William "Bill" Henry, Lynne Roberts, Max Terhune and Joseph Crehan.
 The film was released on December 22, 1937, by Republic Pictures.
Western Jamboree is a 1938 American Western film directed by Ralph Staub and starring Gene Autry, Smiley Burnette, and Jean Rouverol.
 Based on a story by Patricia Harper, the film is about a singing cowboy who goes up against a gang of outlaws who are looking to steal the valuable helium gas beneath the cowboy's ranch.
The Palace also known as Palace: Lock Sinensis is a 2013 Chinese historical romance film.
 This film was directed by Pan Anzi and written by Yu Zheng, and starring Zhou Dongyu, Chen Xiao and Zanilia Zhao.
Ralph Staub (July 21, 1899 in Chicago, Illinois – October 22, 1969, Los Angeles, California) was a movie director, writer and producer.
Sky Bandits (aka Renfrew of the Royal Mounted in Sky Bandits) is a 1940 American film directed by Ralph Staub and released by Monogram Pictures, starring James Newill, Louise Stanley, Dewey Robinson and William Pawley.
 The film is a remake of the film "Ghost Patrol" (1936) with a musical/action formula, similar to the format of the "singing cowboy" films of the era.
For a Few Bullets is a 2016 Chinese comedy western film directed by Peter Pan Anzi and starring Lin Gengxin, Zhang Jingchu and Liu Xiaoqing.
 It was released in China by Wanda Shengshi Film Distribution in IMAX on July 15, 2016.
Crazy New Year’s Eve () is a 2015 Chinese romantic comedy family film directed by Eva Jin, Pan Anzi, Zhang Jiarui and Song Di.
 It was released on February 6, 2015.
Pan Anzi (born 1977 in Nanjing, Jiangsu) is a Chinese film director.
Prairie Moon is a 1938 American Western film directed by Ralph Staub and starring Gene Autry, Smiley Burnette, and Shirley Deane.
 Written by Betty Burbridge and Stanley Roberts, the film is about a singing cowboy who takes care of three tough boys sent west from Chicago after their father dies and leaves them a cattle ranch.

Question: Were Ralph Staub and Pan Anzi both film directors?
Answer: yes