What is the average number of cities of markets with low film market estimate bigger than 10000?
CREATE TABLE market (
    Number_cities INTEGER,
    Market_ID VARCHAR
)

CREATE TABLE film_market_estimation (
    Market_ID VARCHAR,
    Low_Estimate INTEGER
)
SELECT AVG(T2.Number_cities) FROM film_market_estimation AS T1 JOIN market AS T2 ON T1.Market_ID = T2.Market_ID WHERE T1.Low_Estimate > 10000
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 number of cities of markets with low film market estimate bigger than 10000? ### Input: CREATE TABLE market (
    Number_cities INTEGER,
    Market_ID VARCHAR
)

CREATE TABLE film_market_estimation (
    Market_ID VARCHAR,
    Low_Estimate INTEGER
) ### Response: SELECT AVG(T2.Number_cities) FROM film_market_estimation AS T1 JOIN market AS T2 ON T1.Market_ID = T2.Market_ID WHERE T1.Low_Estimate > 10000