CREATE TABLE "polling" (
  "source" text,
  "date" text,
  "cardwell" text,
  "jones" text,
  "knight" text,
  "lanier" text,
  "martin" text
);

Question: What source has a Knight of 2%?
SQL: SELECT "source" FROM "polling" WHERE "knight"='2%';

Question: What Lanier has a Cardwell of 20%?
SQL: SELECT "lanier" FROM "polling" WHERE "cardwell"='20%';

Question: What martin is on july 8–9, 2008?
SQL: SELECT "martin" FROM "polling" WHERE "date"='july 8–9, 2008';

Question: What source has a cardwell of 20%?
SQL: SELECT "source" FROM "polling" WHERE "cardwell"='20%';

Question: What martin has a lanier of 6%?
SQL: SELECT "martin" FROM "polling" WHERE "lanier"='6%';

Question: What cardwell has an insider advantage and a knight of 1%
SQL: SELECT "cardwell" FROM "polling" WHERE "source"='insider advantage' AND "knight"='1%';