CREATE TABLE table_58194 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

How large was the crowd when North Melbourne played as the away team?
SELECT "Crowd" FROM table_58194 WHERE "Away team" = 'north melbourne'
SELECT "Crowd" FROM "table_58194" WHERE "Away team" = 'north melbourne'