Complex sentence: The films tells of Marguerite Gauthier (Greta Garbo), who is born into a lower class famiily, but in time becomes Dame Camille, one of the most glamorous courtesans in Paris.
Split into simpler sentences: The films tells of Marguerite Gauthier (Greta Garbo). She's born into a lower class family, but in time becomes the well known Dame Camille living in high society in Paris.