who was coach before porter grant ?
CREATE TABLE table_203_593 (
    id number,
    "tenure" text,
    "coach" text,
    "years" number,
    "record" text,
    "pct." number,
    "ncaa tournament" number
)
SELECT "coach" FROM table_203_593 WHERE "tenure" < (SELECT "tenure" FROM table_203_593 WHERE "coach" = 'porter grant') ORDER BY "tenure" DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: who was coach before porter grant ? ### Input: CREATE TABLE table_203_593 (
    id number,
    "tenure" text,
    "coach" text,
    "years" number,
    "record" text,
    "pct." number,
    "ncaa tournament" number
) ### Response: SELECT "coach" FROM table_203_593 WHERE "tenure" < (SELECT "tenure" FROM table_203_593 WHERE "coach" = 'porter grant') ORDER BY "tenure" DESC LIMIT 1