Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_18 (season VARCHAR, agg VARCHAR, opponent VARCHAR)
### Question:
Which Season has an Agg of 4–1, and an Opponent of rapid wien?
### Answer:
SELECT season FROM table_name_18 WHERE agg = "4–1" AND opponent = "rapid wien"