Question: What is the release date of this American comedy film directed by Ernst Lubitsch, about a troupe of actors in Nazi-occupied Warsaw, which also has a play based on the same name?

Context paragraphs:
Intoxication (film): Intoxication (German: Rausch) is a 1919 German silent drama film directed by Ernst Lubitsch and starring Asta Nielsen, Alfred Abel and Karl Meinhardt.  It was based on the play "Brott och brott" by August Strindberg.  Lubitsch was loaned out from UFA to the smaller Argus-Film for the production.

Shoe Palace Pinkus: Shoe Palace Pinkus (German: Schuhpalast Pinkus) is a 1916 German silent comedy film directed by Ernst Lubitsch and starring Lubitsch, Else Kentner and Guido Herzfeld.  In English it is sometimes known by the alternative titles Shoe Salon Pinkus and The Shoe Palace.  It was part of the Sally series of films featuring Lubitsch as a sharp young Berliner of Jewish heritage.  After leaving school, a self-confident young man goes to work in a shoe shop.  Soon after, he becomes a shoe tycoon.

Meyer from Berlin: Meyer from Berlin (German: Meyer aus Berlin) is a 1919 German silent comedy film directed by Ernst Lubitsch and starring Lubitsch, Ossi Oswalda and Ethel Orff.  It was part of the Sally series of films featuring Lubitsch as a sharp young Berliner of Jewish heritage.  It was Lubitsch's penultimate film as an actor, after 1920 he devoted himself entirely to screenwriting and directing.

Kohlhiesels Töchter (1920 film): Kohlhiesels Töchter (English title: Kohlhiesel's Daughters) is a 1920 German silent comedy film directed by Ernst Lubitsch and starring Henny Porten, Emil Jannings and Jakob Tiedtke.  It is an adaptation of the play "Kohlhiesel's Daughters" by Hanns Kräly, Lubitsch's frequent collaborator, who also worked on the film's screenplay.  Three further film adaptations have been made of the work including a 1930 sound remake which also starred Porten.

To Be or Not to Be (1942 film): To Be or Not to Be is a 1942 American comedy film directed by Ernst Lubitsch, about a troupe of actors in Nazi-occupied Warsaw who use their abilities at disguise and acting to fool the occupying troops.  It was adapted by Lubitsch (uncredited) and Edwin Justus Mayer from the story by Melchior Lengyel.  The film stars Carole Lombard, Jack Benny, Robert Stack, Felix Bressart, Lionel Atwill, Stanley Ridges and Sig Ruman.  The film was released one month after actress Carole Lombard was killed in an airplane crash.

That Uncertain Feeling (film): That Uncertain Feeling is a 1941 American comedy film directed by Ernst Lubitsch and starring Merle Oberon, Melvyn Douglas and Burgess Meredith.  The film is about the bored wife of an insurance salesman who meets an eccentric pianist and seeks a divorce.  The screenplay by Walter Reisch and Donald Ogden Stewart was based on the 1880 French play "Divorçons" by Victorien Sardou and Émile de Najac.

To Be or Not to Be (play): To Be or Not to Be is a play written by Nick Whitby, based on the 1942 film "To Be or Not to Be".  The play, described as a "black comedy" was produced by the Manhattan Theatre Club, and ran on Broadway in 2008.

The Oyster Princess: The Oyster Princess (German: "Die Austernprinzessin" ) is a 1919 German silent film directed by Ernst Lubitsch.  It is a grotesque comedy in 4 acts about an American millionaire’s spoiled daughter’s marriage that does not go as planned.  The film earned fame from his intangible use of style and sophistication in this film among others.  The term for his style was later dubbed "The Lubitsch Touch".

The Flame (1923 film): The Flame (German: Die Flamme) is a 1923 German silent drama film directed by Ernst Lubitsch and starring Pola Negri, Hermann Thimig and Alfred Abel.  The film is based on a play by Hans Müller.  In the United States it was released under the alternative title Montmartre.  It was the last film Lubitsch made in Germany before emigrating to Hollywood where he directed his first American film "Rosita" for United Artists the same year.

When Four Do the Same: When Four Do the Same (German: Wenn vier Dasselbe tun) is a 1917 German silent comedy drama film directed by Ernst Lubitsch and starring Ossi Oswalda, Emil Jannings and Margarete Kupfer.  Lubitsch himself plays a book shop employee who falls in love with Jannings' daughter.  The film was a key transitional work in Lubitsch's career, as he began to produce films with greater depth than his early light comedies.

Supporting paragraphs: To Be or Not to Be (play) To Be or Not to Be (1942 film)
Answer: 1942