how many rounds had more than 20,000 spectators in attendance ?
CREATE TABLE table_204_881 (
    id number,
    "round" number,
    "date" text,
    "score" text,
    "opponent" text,
    "opponent's score" text,
    "result" text,
    "venue" text,
    "attendance" number,
    "best on ground" text,
    "team" text
)
SELECT COUNT(*) FROM table_204_881 WHERE "attendance" > 20000
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: how many rounds had more than 20,000 spectators in attendance ? ### Input: CREATE TABLE table_204_881 (
    id number,
    "round" number,
    "date" text,
    "score" text,
    "opponent" text,
    "opponent's score" text,
    "result" text,
    "venue" text,
    "attendance" number,
    "best on ground" text,
    "team" text
) ### Response: SELECT COUNT(*) FROM table_204_881 WHERE "attendance" > 20000