What was the purse when Sherri Steinhauer was champion at Woburn Golf and Country Club?
CREATE TABLE "lpga_event" (
  "year" real,
  "date" text,
  "venue" text,
  "champion" text,
  "country" text,
  "score" real,
  "to_par" text,
  "margin_of_victory" text,
  "purse" real,
  "winner_s_share" real
);
SELECT COUNT("purse") FROM "lpga_event" WHERE "champion"='sherri steinhauer' AND "venue"='woburn golf and country club';