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She learned that the best writing used dialogue almost in counterpoint to the visuals, so that what was heard was different from what was seen; she found that a well-made scene could unfold over many pages, with a beginning, middle and end just like a self-contained story; and she observed that each of the best screenplays was driven by an underlying idea that the writer wanted to convey about life itself. It was this that touched her the most, because it meant films could have meaning and be just as effective in catalyzing change as her work in schools.
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Stephen Galloway (Leading Lady: Sherry Lansing and the Making of a Hollywood Groundbreaker)