CREATE TABLE "2012_host_city_election_ballot_results" (
  "city" text,
  "round_1" real,
  "round_2" text,
  "round_3" text,
  "round_4" text
);

Question: Round 3 with less than 54 for Round 4?
SQL: SELECT "round_3" FROM "2012_host_city_election_ballot_results" WHERE "round_4"='54';

Question: Round 4 for larger than 19 Round 1 and a 27 Round 2?
SQL: SELECT "round_4" FROM "2012_host_city_election_ballot_results" WHERE "round_1">19 AND "round_2"='27';

Question: Round 3 with a round 4 of 50?
SQL: SELECT "round_3" FROM "2012_host_city_election_ballot_results" WHERE "round_4"='50';