Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_26 (silver INTEGER, bronze VARCHAR, gold VARCHAR)

### Question ###
What is the sum of Silver with a Bronze that is larger than 0 with a Gold smaller than 0?

### Accurate SQL ###

SELECT SUM(silver) FROM table_name_26 WHERE bronze > 0 AND gold < 0