What was the winning score with a margin victory of 2 strokes?
CREATE TABLE "lpga_tour_8" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "winning_score" FROM "lpga_tour_8" WHERE "margin_of_victory"='2 strokes';