What was the retired time for someone who was on grid 18?
CREATE TABLE table_51463 (
    "Driver" text,
    "Constructor" text,
    "Laps" text,
    "Time/Retired" text,
    "Grid" text
)
SELECT "Time/Retired" FROM table_51463 WHERE "Grid" = '18'
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 was the retired time for someone who was on grid 18? ### Input: CREATE TABLE table_51463 (
    "Driver" text,
    "Constructor" text,
    "Laps" text,
    "Time/Retired" text,
    "Grid" text
) ### Response: SELECT "Time/Retired" FROM table_51463 WHERE "Grid" = '18'