CREATE TABLE table_74654 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the away team when north melbourne is at home?
SELECT "Away team" FROM table_74654 WHERE "Home team" = 'north melbourne'
SELECT "Away team" FROM "table_74654" WHERE "Home team" = 'north melbourne'