CREATE TABLE "semifinals" (
  "rank" real,
  "heat" real,
  "athlete" text,
  "country" text,
  "time" real
);

Question: What is the athlete muna lee lowest time?
SQL: SELECT MIN("time") FROM "semifinals" WHERE "athlete"='muna lee';

Question: What is the sum of rank for the athlete kerron stewart, and a time smaller than 11.05?
SQL: SELECT SUM("rank") FROM "semifinals" WHERE "athlete"='kerron stewart' AND "time"<11.05;

Question: What is a highest time for the heat smaller than 1?
SQL: SELECT MAX("time") FROM "semifinals" WHERE "heat"<1;

Question: What is the highest time for athlete torri edwards, and a rank larger than 6?
SQL: SELECT MAX("time") FROM "semifinals" WHERE "athlete"='torri edwards' AND "rank">6;