What 7:00 has a 7:30 of w-five?
CREATE TABLE "saturday" (
  "7_00" text,
  "7_30" text,
  "8_00" text,
  "8_30" text,
  "9_00" text,
  "10_00" text
);
SELECT "7_00" FROM "saturday" WHERE "7_30"='w-five';