. "American supercentenerian" . "Mamie Eva Walter Keith (March 22, 1873 \u2013 September 20, 1986) was an American supercentenarian and the second oldest recognized person in the world from February 21, 1986 until her death seven months later in the Winchester House nursing home, Libertyville, Illinois."@en . "1873-03-22Z"^^ . . . "1986Z"^^ . . . "1986-09-20Z"^^ . . "Keith, Mamie Eva"@en . "Mamie Eva Keith"@en . "Mamie Eva Walter Keith"@en . "1873Z"^^ . .