CREATE TABLE table_50204 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

Who was the away team on sunday, 13 february?
SELECT "Away team" FROM table_50204 WHERE "Date" = 'sunday, 13 february'
SELECT "Away team" FROM "table_50204" WHERE "Date" = 'sunday, 13 february'