CREATE TABLE table_11170 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Who was Carlton's away team opponent?
SELECT "Away team" FROM table_11170 WHERE "Home team" = 'carlton'
SELECT "Away team" FROM "table_11170" WHERE "Home team" = 'carlton'