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
Give the average number of cities within markets that had a low market estimation larger than 10000?
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
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 > value
Give the average number of cities within markets that had a low market estimation larger than 10000 ?