CREATE TABLE table_8593 ("Track Name" TEXT, "Location" TEXT, "Length" TEXT, "Sanction" TEXT, "Program" TEXT)

What was the sanction of the event at Nashville, Illinois?
SELECT "Sanction" FROM table_8593 WHERE "Location" = 'nashville, illinois'
SELECT "Sanction" FROM "table_8593" WHERE "Location" = 'nashville, illinois'