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_91 (opponent VARCHAR, week VARCHAR, score VARCHAR)
### Question:
Who was the opponent at the game with a score of 42-28 after week 4?
### Answer:
SELECT opponent FROM table_name_91 WHERE week > 4 AND score = "42-28"