CREATE TABLE "heat_3" (
  "rank" real,
  "rowers" text,
  "country" text,
  "time" text,
  "notes" text
);

Question: Who are the Rowers with a Time of 6:39.49?
SQL: SELECT "rowers" FROM "heat_3" WHERE "time"='6:39.49';

Question: What is the Country of the rowers with a Rank of 4?
SQL: SELECT "country" FROM "heat_3" WHERE "rank"=4;