CREATE TABLE table_9579 ("Name" TEXT, "Rank" TEXT, "Tenure" TEXT, "Date of death" TEXT, "Cause of death" TEXT)

What is Gary David Saunders' Tenure?
SELECT "Tenure" FROM table_9579 WHERE "Name" = 'gary david saunders'
SELECT "Tenure" FROM "table_9579" WHERE "Name" = 'gary david saunders'