CREATE TABLE table_31311 ("Date" TEXT, "Competition" TEXT, "Location" TEXT, "Home Team" TEXT, "Result" TEXT, "Away Team" TEXT)

What were the competitions when the away team was fk kozara gradiska?
SELECT "Competition" FROM table_31311 WHERE "Away Team" = 'FK Kozara Gradiska'
SELECT "Competition" FROM "table_31311" WHERE "Away Team" = 'FK Kozara Gradiska'