Question: How many gold medals for bulgaria (bul) with 2 silvers and a less than 18 rank?
SQL: SELECT SUM("Gold") FROM "2-18907412-3" WHERE "Silver" = 2.0 AND "Nation" = 'bulgaria (bul)' AND "Rank" < 18.0;

Question: What's the most bronze medals for great britain (gbr) with more than 1 silver and ranked more than 6?
SQL: SELECT MAX("Bronze") FROM "2-18907412-3" WHERE "Rank" > 6.0 AND "Nation" = 'great britain (gbr)' AND "Silver" > 1.0;

Question: What's the total silver medals having less than 2 gold and 2 bronze?
SQL: SELECT COUNT("Silver") FROM "2-18907412-3" WHERE "Bronze" = 2.0 AND "Gold" < 2.0;