CREATE TABLE "quarterfinal_4" (
  "rank" real,
  "athlete" text,
  "country" text,
  "time" text,
  "notes" text
);

Question: What country is the athlete ekaterina karsten from with a rank less than 4?
SQL: SELECT "country" FROM "quarterfinal_4" WHERE "rank"<4 AND "athlete"='ekaterina karsten';

Question: What is the time of frida svensson's race that had sa/b under the notes?
SQL: SELECT "time" FROM "quarterfinal_4" WHERE "notes"='sa/b' AND "athlete"='frida svensson';

Question: What is the race time for emma twigg?
SQL: SELECT "time" FROM "quarterfinal_4" WHERE "athlete"='emma twigg';

Question: What is the total rank for the athlete that had a race time of 7:34.24?
SQL: SELECT COUNT("rank") FROM "quarterfinal_4" WHERE "time"='7:34.24';