| 21. | He would appear in approximately ten sound films before his death.
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| 22. | She was also the first woman to direct a sound film.
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| 23. | Her career continued into the late 1930s and the era of sound film.
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| 24. | With the advent of sound films, however, his career declined significantly.
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| 25. | Nova Studios would not produce a sound film again until 1983.
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| 26. | It was one of the great silent film comedian s few sound films.
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| 27. | Sound films or " talkies " were still considered innovative.
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| 28. | It features Vittorio De Sica in his first sound film.
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| 29. | He made the earliest sound films in the Persian language.
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| 30. | His golden period lasted until 1929 when sound films arrived.
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