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_59 (general_classification VARCHAR, points_classification VARCHAR, stage VARCHAR)

### Question ###
What is the general classification at stage 18 that has a points classification of Tony Rominger?

### Accurate SQL ###

SELECT general_classification FROM table_name_59 WHERE points_classification = "tony rominger" AND stage = "18"