Question: The director of "An American Tragedy" emigrated permanently to the United States at what age?
Related documents: [0]  [DOC] An American Tragedy is a 1931 Pre-Code drama film, produced and distributed by Paramount Pictures and directed by Josef von Sternberg. The film is based on Theodore Dreiser's 1925 novel "An American Tragedy" which itself alludes to the real life 1906 murder of Grace Brown by Chester Gillette. [END] 
[1]  [DOC] Josef von Sternberg, (29 May 1894 – 22 December 1969) was an Austrian-American film director. His family emigrated permanently to the United States when he was fourteen, and he grew up in New York City. He started working at World Film Company in Fort Lee, New Jersey, where he was mentored by French director Emile Chautard. [END] 
Answer: 
fourteen
fourteen