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_31 ( overs VARCHAR, ground VARCHAR, opponent VARCHAR )

### Question ###
How many overs occurred at Waca Ground against Queensland?

### Accurate SQL ###

SELECT overs FROM table_name_31 WHERE ground = "waca ground" AND opponent = "queensland"