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_28035004_1 ( operator VARCHAR, bodybuilder VARCHAR )

### Question ###
Who is the operator when willowbrook was the bodybuilder?

### Accurate SQL ###

SELECT operator FROM table_28035004_1 WHERE bodybuilder = "Willowbrook"