CREATE TABLE table_56902 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which home team played against the away team Carlton?
SELECT "Home team" FROM table_56902 WHERE "Away team" = 'carlton'
SELECT "Home team" FROM "table_56902" WHERE "Away team" = 'carlton'