Complex sentence: Warren Beatty being the director/writer/film star who brought her to public view in his 1981 film "Reds", which was based on Louise Bryant's life with John Reed.
Split into simpler sentences: Warren Beatty being the director/writer/film star who brought her to public view in his film "Reds" (1981). The 1981 film "Reds" was based on Louise Bryant's life with John Reed.