CREATE TABLE table_9782 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

what is the average bronze when gold is more than 0, the nation is greece and silver is less than 0?
SELECT AVG("Bronze") FROM table_9782 WHERE "Gold" > '0' AND "Nation" = 'greece' AND "Silver" < '0'
SELECT AVG("Bronze") FROM "table_9782" WHERE "Gold" > '0' AND "Nation" = 'greece' AND "Silver" < '0'