CREATE TABLE "opinion_polls" (
  "date_of_opinion_poll" text,
  "conductor" text,
  "sample_size" real,
  "for" text,
  "against" text,
  "undecided" text
);

Question: When was the poll that showed 54% for and 22% undecided conducted?
SQL: SELECT "date_of_opinion_poll" FROM "opinion_polls" WHERE "for"='54%' AND "undecided"='22%';

Question: How many polls taken on different dates show an undecided percentage of 25%?
SQL: SELECT COUNT("date_of_opinion_poll") FROM "opinion_polls" WHERE "undecided"='25%';

Question: When was Quantum Research's poll conducted?
SQL: SELECT "date_of_opinion_poll" FROM "opinion_polls" WHERE "conductor"='Quantum Research';

Question: Who conducted the poll with sample size of 2000 that shows 18% undecided?
SQL: SELECT "conductor" FROM "opinion_polls" WHERE "undecided"='18%' AND "sample_size"=2000;