Table: wrestling_championships_1958
Columns: rank
nation
gold
silver
bronze
total

Question: What is Nation, when Bronze is 1, when Gold is greater than 0, and when Rank is 2?
SQL: SELECT "nation" FROM wrestling_championships_1958 WHERE "bronze" = 1 AND "gold" > 0 AND "rank" = '2'

Question: What is the average Total, when Bronze is greater than 0, when Silver is greater than 0, when Gold is greater than 2, and when Nation is Soviet Union?
SQL: SELECT AVG("total") FROM wrestling_championships_1958 WHERE "bronze" > 0 AND "silver" > 0 AND "gold" > 2 AND "nation" = 'soviet union'

Question: What is the average Gold, when Nation is Yugoslavia, and when Silver is greater than 0?
SQL: SELECT AVG("gold") FROM wrestling_championships_1958 WHERE "nation" = 'yugoslavia' AND "silver" > 0

Question: What is the average Bronze, when Total is 4, and when Silver is less than 2?
SQL: SELECT AVG("bronze") FROM wrestling_championships_1958 WHERE "total" = 4 AND "silver" < 2