CREATE TABLE table_33557 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which away team played at Lake Oval?
SELECT "Away team" FROM table_33557 WHERE "Venue" = 'lake oval'
SELECT "Away team" FROM "table_33557" WHERE "Venue" = 'lake oval'