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 files (f_id VARCHAR, duration VARCHAR); CREATE TABLE song (artist_name VARCHAR, f_id VARCHAR)
### Question:
What is the name of the artist who produced the shortest song?
### Answer:
SELECT T1.artist_name FROM song AS T1 JOIN files AS T2 ON T1.f_id = T2.f_id ORDER BY T2.duration LIMIT 1