When did grid 8 finish?
CREATE TABLE table_8491 (
    "Name" text,
    "Team" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real,
    "Points" real
)
SELECT "Time/Retired" FROM table_8491 WHERE "Grid" = '8'
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: When did grid 8 finish? ### Input: CREATE TABLE table_8491 (
    "Name" text,
    "Team" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real,
    "Points" real
) ### Response: SELECT "Time/Retired" FROM table_8491 WHERE "Grid" = '8'