CREATE TABLE "semifinal_2" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" text
);

Question: Who has rank 5?
SQL: SELECT "name" FROM "semifinal_2" WHERE "rank"=5;

Question: Which nationality has rank 4?
SQL: SELECT "nationality" FROM "semifinal_2" WHERE "rank"=4;