CREATE TABLE table_6891 ("Position" FLOAT, "Team" TEXT, "Points" FLOAT, "Played" FLOAT, "Drawn" FLOAT, "Lost" FLOAT, "Against" FLOAT, "Difference" TEXT)

What is the average Against when the drawn is more than 2 and the Difference of- 17, and a Played smaller than 20?
SELECT AVG("Against") FROM table_6891 WHERE "Drawn" > '2' AND "Difference" = '- 17' AND "Played" < '20'
SELECT AVG("Against") FROM "table_6891" WHERE "Difference" = '- 17' AND "Drawn" > '2' AND "Played" < '20'