Which 1974 documentary film, directed by Albert and David Maysles, is an intimate portrait of an eccentric mother and daughter living in a dilapidated mansion?

'Grey Gardens' is a 1975 American documentary film, directed by Albert and David Maysles, that follows the lives of Edith Bouvier Beale ('Big Edie') and her daughter Edith Ewing Bouvier Beale ('Little Edie'), aunt and cousin of Jacqueline Kennedy Onassis, who live in a dilapidated mansion. It is a classic observational documentary.