What is the general classification at stage 18 that has a points classification of Tony Rominger?
CREATE TABLE table_name_59 (
    general_classification VARCHAR,
    points_classification VARCHAR,
    stage VARCHAR
)
SELECT general_classification FROM table_name_59 WHERE points_classification = "tony rominger" AND stage = "18"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the general classification at stage 18 that has a points classification of Tony Rominger? ### Input: CREATE TABLE table_name_59 (
    general_classification VARCHAR,
    points_classification VARCHAR,
    stage VARCHAR
) ### Response: SELECT general_classification FROM table_name_59 WHERE points_classification = "tony rominger" AND stage = "18"