text: 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_21 (silver INTEGER, bronze VARCHAR, total VARCHAR, nation VARCHAR)
  ### Question:
  What is the sum of all silver medals with less than 23 medals in total and more than 3 bronze medals for the United States?
  ### Answer:
  SELECT SUM(silver) FROM table_name_21 WHERE total < 23 AND nation = "united states" AND bronze > 3