CREATE TABLE "heat_1" (
  "rank" real,
  "athletes" text,
  "country" text,
  "time" text,
  "notes" text
);

Question: What is the notes entry for the row with a Time of 1:42.309?
SQL: SELECT "notes" FROM "heat_1" WHERE "time"='1:42.309';

Question: What is the rank for China?
SQL: SELECT SUM("rank") FROM "heat_1" WHERE "country"='china';

Question: What is the time for Cuba, with a notes entry of QS?
SQL: SELECT "time" FROM "heat_1" WHERE "notes"='qs' AND "country"='cuba';