What was the margin of victory on Apr 8, 1979?
CREATE TABLE "lpga_tour_wins_8" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "margin_of_victory" FROM "lpga_tour_wins_8" WHERE "date"='apr 8, 1979';