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_43 (years_for_jazz VARCHAR, position VARCHAR, player VARCHAR)

### Question ###
Who is the center position of Years for Jazz, Greg Ostertag?

### Accurate SQL ###

SELECT years_for_jazz FROM table_name_43 WHERE position = "center" AND player = "greg ostertag"