What movie screenplay written by Alvin Sargent is based on a book about the growth of a protagonist from youth to adulthood? 
Anywhere but Here (film): Anywhere but Here is a 1999 American coming-of-age comedy-drama film, based on the novel of the same name by Mona Simpson. Coming-of-age story: In genre studies, a coming-of-age story is a genre of literature and film that focuses on the growth of a protagonist from youth to adulthood ("coming of age").
i don't know