Which 7:30 has a 10:30 of le grand journal?
CREATE TABLE "saturday" (
  "7_00" text,
  "7_30" text,
  "8_00" text,
  "8_30" text,
  "9_00" text,
  "10_00" text,
  "10_30" text
);
SELECT "7_30" FROM "saturday" WHERE "10_30"='le grand journal';