CREATE TABLE table_56965 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What date was the game played at princes park?
SELECT "Date" FROM table_56965 WHERE "Venue" = 'princes park'
SELECT "Date" FROM "table_56965" WHERE "Venue" = 'princes park'