CREATE TABLE table_53023 ("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 score for Away team North Melbourne?
SELECT "Away team score" FROM table_53023 WHERE "Away team" = 'north melbourne'
SELECT "Away team score" FROM "table_53023" WHERE "Away team" = 'north melbourne'