CREATE TABLE table_204_807 (id DECIMAL, "date" TEXT, "winner" TEXT, "runner-up" TEXT, "result" TEXT, "site" TEXT, "attendance" DECIMAL)

what is the difference in attendees for maryland on february 10 , 1979 to february 11 , 1978 ?
SELECT ABS((SELECT "attendance" FROM table_204_807 WHERE "date" = 'february 10, 1979') - (SELECT "attendance" FROM table_204_807 WHERE "date" = 'february 11, 1978'))
SELECT ABS((SELECT "attendance" FROM "table_204_807" WHERE "date" = 'february 10, 1979') - (SELECT "attendance" FROM "table_204_807" WHERE "date" = 'february 11, 1978'))