CREATE TABLE table_51621 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which away team has an attendance of more than 17,000?
SELECT "Away team" FROM table_51621 WHERE "Crowd" > '17,000'
SELECT "Away team" FROM "table_51621" WHERE "Crowd" > '17,000'