CREATE TABLE table_name_71 (silver INT, total VARCHAR, gold VARCHAR, nation VARCHAR)

Which Silver has a Gold of 2, and a Nation of puerto rico, and a Total smaller than 12?
SELECT SUM(silver) FROM table_name_71 WHERE gold = 2 AND nation = "puerto rico" AND total < 12
SELECT SUM("silver") FROM "table_name_71" WHERE "gold" = 2 AND "nation" = "puerto rico" AND "total" < 12