CREATE TABLE table_57220 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Venue" CLOB, "Crowd" FLOAT, "Date" CLOB)

Which away team had a crowd bigger than 21,000?
SELECT "Away team" FROM table_57220 WHERE "Crowd" > '21,000'
SELECT "Away team" FROM "table_57220" WHERE "Crowd" > '21,000'