Table: judocomp1971
Columns: rank
nation
gold
silver
bronze
total

Question: What is the sum of Silver with a Bronze that is larger than 0 with a Gold smaller than 0?
SQL: SELECT SUM("silver") FROM judocomp1971 WHERE "bronze" > 0 AND "gold" < 0

Question: What is the average Silver with a Total that is smaller than 1?
SQL: SELECT AVG("silver") FROM judocomp1971 WHERE "total" < 1

Question: What is the lowest Rank with a Nation that is east germany?
SQL: SELECT MIN("rank") FROM judocomp1971 WHERE "nation" = 'east germany'