Among episodes from 10 to 20, which episode has more than 200 votes?
episodes from 10 to 20 refers to episode BETWEEN 10 and 20; more than 200 votes refers to COUNT(votes) > 200
SELECT DISTINCT T1.episode FROM Episode AS T1 INNER JOIN Vote AS T2 ON T2.episode_id = T1.episode_id WHERE T1.episode BETWEEN 10 AND 20 AND T2.votes > 200;