CREATE TABLE table_43138 ("Date" CLOB, "Time" CLOB, "Home" CLOB, "Away" CLOB, "Score" CLOB, "Ground" CLOB)

On what date were the Ottawa Swans the away team?
SELECT "Date" FROM table_43138 WHERE "Away" = 'ottawa swans'
SELECT "Date" FROM "table_43138" WHERE "Away" = 'ottawa swans'