What is the average Laps that shows spun off for time?
CREATE TABLE table_34921 (
    "Team" text,
    "Driver" text,
    "Laps" real,
    "Time" text,
    "Grid" real
)
SELECT AVG("Laps") FROM table_34921 WHERE "Time" = 'spun off'
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 average Laps that shows spun off for time? ### Input: CREATE TABLE table_34921 (
    "Team" text,
    "Driver" text,
    "Laps" real,
    "Time" text,
    "Grid" real
) ### Response: SELECT AVG("Laps") FROM table_34921 WHERE "Time" = 'spun off'