CREATE TABLE table_52958 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the crowd for away team of north melbourne?
SELECT "Crowd" FROM table_52958 WHERE "Away team" = 'north melbourne'
SELECT "Crowd" FROM "table_52958" WHERE "Away team" = 'north melbourne'