CREATE TABLE table_11567 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the lowest crowd when North Melbourne played at home?
SELECT MIN("Crowd") FROM table_11567 WHERE "Home team" = 'north melbourne'
SELECT MIN("Crowd") FROM "table_11567" WHERE "Home team" = 'north melbourne'