Complex sentence: He began his film career acting in German films in the 1930s, but left Austria in 1935 for Great Britain; one year after the 1934 Austrian Civil War which ended with installation of Austrofascism.
Split into simpler sentences: He began his film career acting in German films in the 1930s. In 1935 he emigrated from Austria for Great Britain; one year after the 1934 Austrian Civil War which ended with installation of Austrofascism.