CREATE TABLE table_1506 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" FLOAT)

what is the attendance where the game site is kingdome?
SELECT MIN("Attendance") FROM table_1506 WHERE "Game site" = 'Kingdome'
SELECT MIN("Attendance") FROM "table_1506" WHERE "Game site" = 'Kingdome'