What is the pole position of the Portuguese Grand Prix?
CREATE TABLE table_57238 (
    "Round" real,
    "Grand Prix" text,
    "Pole Position" text,
    "Fastest Lap" text,
    "Winning Driver" text,
    "Winning Constructor" text,
    "Report" text
)
SELECT "Pole Position" FROM table_57238 WHERE "Grand Prix" = 'portuguese grand prix'
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: What is the pole position of the Portuguese Grand Prix? ### Input: CREATE TABLE table_57238 (
    "Round" real,
    "Grand Prix" text,
    "Pole Position" text,
    "Fastest Lap" text,
    "Winning Driver" text,
    "Winning Constructor" text,
    "Report" text
) ### Response: SELECT "Pole Position" FROM table_57238 WHERE "Grand Prix" = 'portuguese grand prix'