CREATE TABLE table_11947 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the lowest Crowd Size for the Home Team of North Melbourne?
SELECT MIN("Crowd") FROM table_11947 WHERE "Home team" = 'north melbourne'
SELECT MIN("Crowd") FROM "table_11947" WHERE "Home team" = 'north melbourne'