Question: Who is from South Korea and has a heat less than 3?
SQL: SELECT "Name" FROM "2-18625708-3" WHERE "Heat" < 3.0 AND "Nationality" = 'South Korea';

Question: What is the highest heat of the athlete from spain with a lane less than 7?
SQL: SELECT MAX("Heat") FROM "2-18625708-3" WHERE "Nationality" = 'spain' AND "Lane" < 7.0;

Question: What is the average lane of the athlete from japan with a time of 4:37.35 and a heat less than 3?
SQL: SELECT AVG("Lane") FROM "2-18625708-3" WHERE "Nationality" = 'japan' AND "Time" = '4:37.35' AND "Heat" < 3.0;