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_30 (bronze INTEGER, silver VARCHAR, total VARCHAR, gold VARCHAR)
### Question:
Who has a total of the Bronze less than 4, gold more than 0, and no silver?
### Answer:
SELECT SUM(bronze) FROM table_name_30 WHERE total < 4 AND gold > 0 AND silver = 0