At what venue is the margin of victory 7 strokes?
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 "venue" FROM "lpga_event" WHERE "margin_of_victory"='7 strokes';