premise: Without Meyer, No Celebration is Complete (German: Keine Feier ohne Meyer) is a 1931 German comedy film directed by Carl Boese and starring Sig Arno, Ralph Arthur Roberts and Dina Gralla. Boese made a number of films featuring Jewish comedians during the Weimar Era.
hypothesis: Carl Boese had a Jewish comedian appear in a film before the Weimar Era.
reason: The context does not provide whether or not Boese had any Jewish comedians star in any of his films prior to the Weimar Era.