Which party won less than 21 seats, has 0 percent of seats, and 69757 votes cast?
CREATE TABLE "electoral_effect" (
  "party" text,
  "votes_cast" real,
  "percentage" real,
  "seats_won" real,
  "percent_of_seats" real
);
SELECT "party" FROM "electoral_effect" WHERE "seats_won"<21 AND "percent_of_seats"=0 AND "votes_cast"=69757;