CREATE TABLE "opinion_polls" (
  "polling_firm" text,
  "date" text,
  "venstre_v" text,
  "social_democrats_a" text,
  "danish_people_s_party_o" text,
  "socialist_people_s_party_f" text,
  "conservative_people_s_party_c" text,
  "social_liberal_party_b" text,
  "liberal_alliance_i" text,
  "red_green_alliance" text,
  "christian_democrats_k" text,
  "government" text,
  "opposition" text
);

Question: Which Social Liberal Party has 4.5% of the Conservative People's Party?
SQL: SELECT "social_liberal_party_b" FROM "opinion_polls" WHERE "conservative_people_s_party_c"='4.5%';

Question: What opposition do 31.1% of Social Democrats have?
SQL: SELECT "opposition" FROM "opinion_polls" WHERE "social_democrats_a"='31.1%';

Question: What is the Liberal Alliance that is backed by the Polling Firm, Capacent, and 13.0% of the Socialist People's Party?
SQL: SELECT "liberal_alliance_i" FROM "opinion_polls" WHERE "polling_firm"='capacent' AND "socialist_people_s_party_f"='13.0%';