Question: What is the time in a heat smaller than 5, in Lane 5, for Vietnam?
SQL: SELECT "Time" FROM "2-18624773-3" WHERE "Heat" < 5.0 AND "Lane" = 5.0 AND "Nationality" = 'Vietnam';

Question: What is the smallest lane number of Xue Ruipeng?
SQL: SELECT MIN("Lane") FROM "2-18624773-3" WHERE "Name" = 'Xue Ruipeng';