Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_71 (silver INTEGER, total VARCHAR, gold VARCHAR, nation VARCHAR)
### Question:
Which Silver has a Gold of 2, and a Nation of puerto rico, and a Total smaller than 12?
### Answer:
SELECT SUM(silver) FROM table_name_71 WHERE gold = 2 AND nation = "puerto rico" AND total < 12