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_23 (rank__number VARCHAR, opponent_number VARCHAR)
### Question:
What was the rank when the opponent was Wisconsin (played at Wisconsin)?
### Answer:
SELECT rank__number FROM table_name_23 WHERE opponent_number = "at wisconsin"