What 7:30 has 8:00 risk takers?
CREATE TABLE "saturday" (
  "7_00" text,
  "7_30" text,
  "8_00" text,
  "8_30" text,
  "9_00" text,
  "10_00" text
);
SELECT "7_30" FROM "saturday" WHERE "8_00"='risk takers';