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 (week INTEGER, opponent VARCHAR)
### Question:
What is the biggest week with an opponent of washington redskins?
### Answer:
SELECT MAX(week) FROM table_name_18 WHERE opponent = "washington redskins"