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_11803648_20 (nationality VARCHAR, club_team VARCHAR)

### Question ###
What is the Nationality when the club team is Peterborough Petes (OHL)?

### Accurate SQL ###

SELECT nationality FROM table_11803648_20 WHERE club_team = "Peterborough Petes (OHL)"