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_11365528_2 ( home_ground VARCHAR, president VARCHAR )

### Question ###
The president, peter williamson, had how many home grounds?

### Accurate SQL ###

SELECT COUNT(home_ground) FROM table_11365528_2 WHERE president = "Peter Williamson"