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