Which date has a PSOE of 36.1%?
CREATE TABLE "176_seats_needed_for_a_majority" (
  "polling_firm" text,
  "date" text,
  "link" text,
  "psoe" text,
  "others" text,
  "lead" text
);
SELECT "date" FROM "176_seats_needed_for_a_majority" WHERE "psoe"='36.1%';