Complex sentence: She had her first film role in 1935 and two years later achieved her big breakthrough in the film adaptation of the play "Unentschuldigte Stunde" ("Unexcused Hour").
Split into simpler sentences: She had her first film role in 1935. Two years later she achieved her career breakthrough in the film adaptation of "Unentschuldigte Stunde" ("Unexcused Hour").