Table: wwc_1990
Columns: rank
nation
gold
silver
bronze
total

Question: What is the average number of bronze medals for total of all nations?
SQL: SELECT AVG("bronze") FROM wwc_1990 WHERE "nation" = 'total'

Question: What is the sum of gold medals for a rank of 14?
SQL: SELECT SUM("gold") FROM wwc_1990 WHERE "rank" = '14'

Question: Which rank has 1 silver medal and more than 1 gold medal?
SQL: SELECT "rank" FROM wwc_1990 WHERE "silver" = 1 AND "gold" > 1