Question: When was the poll that showed 54% for and 22% undecided conducted?
SQL: SELECT "Date of opinion poll" FROM "1-20683381-2" 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 "1-20683381-2" WHERE "Undecided" = '25%';

Question: When was Quantum Research's poll conducted?
SQL: SELECT "Date of opinion poll" FROM "1-20683381-2" WHERE "Conductor" = 'Quantum Research';

Question: Who conducted the poll with sample size of 2000 that shows 18% undecided?
SQL: SELECT "Conductor" FROM "1-20683381-2" WHERE "Undecided" = '18%' AND "Sample size" = 2000.0;