Question: What's Brazil's lane with a time less than 21.15?
SQL: SELECT MIN("Lane") FROM "2-18569011-6" WHERE "Nationality" = 'Brazil' AND "Time" < 21.15;

Question: What's russia's lane when they were ranked before 1?
SQL: SELECT MAX("Lane") FROM "2-18569011-6" WHERE "Nationality" = 'russia' AND "Rank" < 1.0;

Question: What's bulgaria's lane with a time more than 21.55?
SQL: SELECT SUM("Lane") FROM "2-18569011-6" WHERE "Nationality" = 'bulgaria' AND "Time" > 21.55;