CREATE TABLE table_24494 ("State  ( class ) " TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date of successors formal installation" TEXT)

Who is every vacator if date of successors formal installation is August 8, 1960?
SELECT "Vacator" FROM table_24494 WHERE "Date of successors formal installation" = 'August 8, 1960'
SELECT "Vacator" FROM "table_24494" WHERE "Date of successors formal installation" = 'August 8, 1960'