CREATE TABLE "semifinal_1" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" real
);

Question: What's the lowest rank of Lane 3?
SQL: SELECT MIN("rank") FROM "semifinal_1" WHERE "lane"=3;

Question: What's the highest lane of rank 4 with a time less than 24.72?
SQL: SELECT MAX("lane") FROM "semifinal_1" WHERE "time"<24.72 AND "rank"=4;

Question: What's the time of Britta Steffen in a lane less than 4?
SQL: SELECT SUM("time") FROM "semifinal_1" WHERE "lane"<4 AND "name"='britta steffen';

Question: What's the lowest rank of the United States with a time less than 24.63?
SQL: SELECT MIN("rank") FROM "semifinal_1" WHERE "nationality"='united states' AND "time"<24.63;