What is the largest number of draws of St Josephs with losses greater than 6 and less than 1250 against?
CREATE TABLE "2010_ladder" (
  "geelong_fl" text,
  "wins" real,
  "byes" real,
  "losses" real,
  "draws" real,
  "against" real
);
SELECT MAX("draws") FROM "2010_ladder" WHERE "losses">6 AND "geelong_fl"='st josephs' AND "against"<1250;