CREATE TABLE table_64994 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

How many silver medals did spain have when they had more than 0 bronze medals and less than 54 total medals?
SELECT "Silver" FROM table_64994 WHERE "Bronze" > '0' AND "Total" < '54' AND "Nation" = 'spain'
SELECT "Silver" FROM "table_64994" WHERE "Bronze" > '0' AND "Nation" = 'spain' AND "Total" < '54'