SELECT "Away team" FROM table_4808 WHERE "Home team" = 'north melbourne'
Who is the away side when north melbourne is the home side?
CREATE TABLE table_4808 (
    "Home team" text,
    "Home team score" text,
    "Away team" text,
    "Away team score" text,
    "Venue" text,
    "Crowd" real,
    "Date" text
)