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_84 (songwriter_s_ VARCHAR, production_credits VARCHAR, track VARCHAR)
### Question:
Who was the songwriter for Track 4, produced by nigel wright and john smits?
### Answer:
SELECT songwriter_s_ FROM table_name_84 WHERE production_credits = "nigel wright and john smits" AND track = 4