CREATE TABLE table_54684 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Venue" CLOB, "Crowd" FLOAT, "Date" CLOB)

When the crowd was over 16,000 people and south melbourne was the away team, what date was the game?
SELECT "Date" FROM table_54684 WHERE "Crowd" > '16,000' AND "Away team" = 'south melbourne'
SELECT "Date" FROM "table_54684" WHERE "Away team" = 'south melbourne' AND "Crowd" > '16,000'