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_18828487_1 (prize_fund VARCHAR, venue VARCHAR)

### Question ###
How much was the prize money for  rwe-sporthalle, mülheim ?

### Accurate SQL ###

SELECT prize_fund FROM table_18828487_1 WHERE venue = "RWE-Sporthalle, Mülheim"