CREATE TABLE table_41139 ("S No" FLOAT, "Team  ( A ) " TEXT, "Team  ( B ) " TEXT, "Winner" TEXT, "Margin" TEXT, "Match Date" TEXT)

What is Team (B), when S No is less than 18, when Margin is 8 Wickets, and when Match Date is Oct 30, 1989?
SELECT "Team (B)" FROM table_41139 WHERE "S No" < '18' AND "Margin" = '8 wickets' AND "Match Date" = 'oct 30, 1989'
SELECT "Team (B)" FROM "table_41139" WHERE "Margin" = '8 wickets' AND "Match Date" = 'oct 30, 1989' AND "S No" < '18'