CREATE TABLE artist (name VARCHAR, artist_id VARCHAR)
CREATE TABLE exhibition (exhibition_id VARCHAR, artist_id VARCHAR)
CREATE TABLE exhibition_record (exhibition_id VARCHAR, attendance INT)

Show all artist names with an average exhibition attendance over 200.
SELECT T3.name FROM exhibition_record AS T1 JOIN exhibition AS T2 ON T1.exhibition_id = T2.exhibition_id JOIN artist AS T3 ON T3.artist_id = T2.artist_id GROUP BY T3.artist_id HAVING AVG(T1.attendance) > 200
SELECT "T3"."name" FROM "exhibition_record" AS "T1" JOIN "exhibition" AS "T2" ON "T1"."exhibition_id" = "T2"."exhibition_id" JOIN "artist" AS "T3" ON "T2"."artist_id" = "T3"."artist_id" GROUP BY "T3"."artist_id" HAVING AVG("T1"."attendance") > 200