Complex sentence: Beranger was a large proponent of the idea that Hollywood had a responsibility to teach the next generation of artists, and would write a much-used text "Writing for the Screen" in 1950 and continue to lecture on screenwriting for the rest of her life.
Split into simpler sentences: Beranger was a large proponent of the idea that Hollywood had a responsibility to teach the next generation of artists. She would write a much-used text "Writing for the Screen" in 1950 and continue to lecture on screenwriting the rest of her life.