CREATE TABLE "heat_4" (
  "rank" real,
  "rowers" text,
  "country" text,
  "time" text,
  "notes" text
);

Question: What were the notes for the time of 6:34.51?
SQL: SELECT "notes" FROM "heat_4" WHERE "time"='6:34.51';

Question: What is the rank for the rowers with the time of 6:24.35?
SQL: SELECT "rank" FROM "heat_4" WHERE "time"='6:24.35';

Question: Which rowers represented portugal and had notes of r?
SQL: SELECT "rowers" FROM "heat_4" WHERE "notes"='r' AND "country"='portugal';

Question: Which rowers represented the country of portugal?
SQL: SELECT "rowers" FROM "heat_4" WHERE "country"='portugal';