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 club_rank ( Silver INTEGER )

### Question ###
What are the maximum and minimum number of silver medals for clubs.

### Accurate SQL ###

SELECT MAX(Silver), MIN(Silver) FROM club_rank