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_43929 ( "Sport" text, "Gold" real, "Silver" real, "Bronze" real, "Total" real )

### Question ###
What is the smallest number of silvers associated with bronzes under 20, totals of 1, golds of 0, and in Water Polo?

### Accurate SQL ###

SELECT MIN("Silver") FROM table_43929 WHERE "Bronze" < '20' AND "Total" = '1' AND "Sport" = 'water polo' AND "Gold" < '0'